Hellemans, A. (1988). The timetables of science: A chronology of the most important people and events in the history of science. New York: Simon and Schuster.
Dyfyniad Arddull ChicagoHellemans, Alexander. The Timetables of Science: A Chronology of the Most Important People and Events in the History of Science. New York: Simon and Schuster, 1988.
Dyfyniad MLAHellemans, Alexander. The Timetables of Science: A Chronology of the Most Important People and Events in the History of Science. New York: Simon and Schuster, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.