APA (7th ed.) Citation

Dunkling, L. A., & Room, A. (1990). The Guinness book of money. Guinness.

Chicago Style (17th ed.) Citation

Dunkling, Leslie Alan, and Adrian Room. The Guinness Book of Money. Enfield: Guinness, 1990.

MLA (9th ed.) Citation

Dunkling, Leslie Alan, and Adrian Room. The Guinness Book of Money. Guinness, 1990.