Gaya APA

Hellemans, A., Bunch, B, H. (1993). The Timetables of technology : a chronology of the most important people and events in the history of technology / Bryan Bunch, Alexander Hellemans . : Simon n Schuster.

Gaya MLA

Hellemans, Alexander., Bunch, Bryan, H.. "The Timetables of technology : a chronology of the most important people and events in the history of technology / Bryan Bunch, Alexander Hellemans". : Simon n Schuster, 1993. Textbook.