APA (7th ed.) Citation

Packard, L. O. (1948). Geography of the world. The Macmillan.

Chicago Style (17th ed.) Citation

Packard, Leonard O. Geography of the World. New York: The Macmillan, 1948.

MLA (9th ed.) Citation

Packard, Leonard O. Geography of the World. The Macmillan, 1948.

Warning: These citations may not always be 100% accurate.