APA (7th ed.) Citation

Collins, G., & Collins, D. (1991). The millennium book: Your essential all-purpose guide to the year 2000. Doubleday.

Chicago Style (17th ed.) Citation

Collins, Gail, and Dan Collins. The Millennium Book: Your Essential All-purpose Guide to the Year 2000. New York u.a: Doubleday, 1991.

MLA (9th ed.) Citation

Collins, Gail, and Dan Collins. The Millennium Book: Your Essential All-purpose Guide to the Year 2000. Doubleday, 1991.