Gaya APA

Chapman, S. (1964). IGY: year of discovery: the story of the international geophysical year (7th ed). Michigan: An Arbor The University of Michigan Press.

Gaya MLA

Chapman, Sydney.. "IGY: year of discovery: the story of the international geophysical year". 7th ed Michigan: An Arbor The University of Michigan Press, 1964. Printed Book.