H., B., B., Alexander, 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
Bunch, Bryan, H.., Hellemans, Alexander."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.