APA (7th ed.) Citation

Hobson, B., & Obojski, R. (1970). Illustrated encyclopedia of world coins. Doubleday.

Chicago Style (17th ed.) Citation

Hobson, Burton, and Robert Obojski. Illustrated Encyclopedia of World Coins. Garden City, N.Y.: Doubleday, 1970.

MLA (9th ed.) Citation

Hobson, Burton, and Robert Obojski. Illustrated Encyclopedia of World Coins. Doubleday, 1970.