Gold coins of the world : Complete from 600 A.D. to the present.

MLA

Friedberg, Robert. Gold Coins of the World : Complete From 600 A.d. to the Present. New York: The Coin and Currency Institute, 1965.

APA

Friedberg, R. (1965). Gold coins of the world : Complete from 600 A.D. to the present. New York: The Coin and Currency Institute.

Chicago

Friedberg, Robert Gold Coins of the World : Complete From 600 A.D. to the Present. New York: The Coin and Currency Institute, 1965.