Παραπομπή APA

Chapman, S. (1959). IGY: year of discovery: The story of the International Geophysical Year. Ann Arbor: University of Michigan Press.

Παραπομπή Chicago Style

Chapman, Sydney. IGY: Year of Discovery: The Story of the International Geophysical Year. Ann Arbor: University of Michigan Press, 1959.

Παραπομπή MLA

Chapman, Sydney. IGY: Year of Discovery: The Story of the International Geophysical Year. Ann Arbor: University of Michigan Press, 1959.

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