APA (7th ed.) Citation

Dirr, M., Hildebrand, R., & Hildebrand, R. (1984). All about evergreens. Ortho Books.

Chicago Style (17th ed.) Citation

Dirr, Michael, Ron Hildebrand, and Ronda Hildebrand. All About Evergreens. San Francisco: Ortho Books, 1984.

MLA (9th ed.) Citation

Dirr, Michael, et al. All About Evergreens. Ortho Books, 1984.