Gaya APA

Gibbs, W, T., Zaner, K, M. (1991). Coin World Guide to U. S. Coins [Prices, dan Value Trends] (Ed. 3. Cet. 1.--). America: A Signet Book.

Gaya MLA

Gibbs, William, T.., Zaner, Keith, M.. "Coin World Guide to U. S. Coins [Prices, dan Value Trends]". Ed. 3. Cet. 1.-- America: A Signet Book, 1991. Text.