APA (7th ed.) Citation

Mackay, J. A. (1964). The Harrison collection of die proofs of postage stamps.

Chicago Style (17th ed.) Citation

Mackay, James A. The Harrison Collection of Die Proofs of Postage Stamps. 1964.

MLA (9th ed.) Citation

Mackay, James A. The Harrison Collection of Die Proofs of Postage Stamps. 1964.

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