add all the books to the references

general/bibliography.bib

@@ -326,4 +326,61 @@
 	month = {Jan},
 	note = {[Online; accessed 14. Jan. 2019]},
 	url = {https://github.com/bit-team/backintime}
+}
+@book{hitch,
+	author = {Reitz, Kenneth and Schlusser, Tanya},
+	title = {{The Hitchhiker's Guide to Python: Best Practices for Development}},
+	year = {2016},
+	month = {Sep},
+	isbn = {978-149193317-6},
+	publisher = {O'Reilly Media},
+	url = {https://www.amazon.com/Hitchhikers-Guide-Python-Practices-Development/dp/1491933178}
+}
+@book{test,
+	author = {Percival, Harry J. W.},
+	title = {{Test-Driven Development with Python: Obey the Testing Goat: Using Django, Selenium, and JavaScript}},
+	year = {2017},
+	month = {Aug},
+	publisher = {O'Reilly Media},
+	url = {https://www.amazon.com/Test-Driven-Development-Python-Selenium-JavaScript-ebook/dp/B074HXXXLS}
+}
+@book{hard,
+	author = {Shaw, Zed A.},
+	title = {{Learn Python 3 the Hard Way: A Very Simple Introduction to the Terrifyingly Beautiful World of Computers and Code (Zed Shaw's Hard Way Series)}},
+	year = {2017},
+	month = {Jun},
+	publisher = {limits},
+	url = {https://www.amazon.com/Learn-Python-Hard-Way-Introduction-ebook/dp/B07378P8W6}
+}
+@book{rapid,
+	author = {Summerfield, Mark},
+	title = {{Rapid GUI Programming with Python and Qt: The Definitive Guide to PyQt Programming (Pearson Open Source Software Development Series)}},
+	year = {2007},
+	month = {Oct},
+	publisher = {limits},
+	url = {https://www.amazon.com/Rapid-GUI-Programming-Python-Development-ebook/dp/B004YW6LNA}
+}
+@book{idiomatic,
+	author = {Knupp, Jeff},
+	title = {{Writing Idiomatic Python 3}},
+	year = {2013},
+	month = {Nov},
+	publisher = {Jeff Knupp},
+	url = {https://www.amazon.com/Writing-Idiomatic-Python-Jeff-Knupp-ebook/dp/B00B5VXMRG}
+}
+@book{weniger,
+	author = {Passig, Kathrin and Jander, Johannes},
+	title = {{Weniger schlecht programmieren (German Edition)}},
+	year = {2013},
+	month = {Dec},
+	publisher = {O'Reilly Media},
+	url = {https://www.amazon.com/Weniger-schlecht-programmieren-German-Kathrin-ebook/dp/B06XDGMV7P}
+}
+@book{qtpython,
+	author = {Harwani, B. M.},
+	title = {{Qt5 Python GUI Programming Cookbook: Building responsive and powerful cross-platform applications with PyQt}},
+	year = {2018},
+	month = {Jul},
+	publisher = {Packt Publishing},
+	url = {https://www.amazon.com/Qt5-Python-Programming-Cookbook-cross-platform-ebook/dp/B079S4Q9T2}
 }