APA (7th ed.) Citation

Horner, J. R., Gorman, J., Braginetz, D., & Ellingsen, K. (1990). Digging dinosaurs. Perennial Library.

Chicago Style (17th ed.) Citation

Horner, John R., James Gorman, Donna Braginetz, and Kris Ellingsen. Digging Dinosaurs. New York [etc.]: Perennial Library, 1990.

MLA (9th ed.) Citation

Horner, John R., et al. Digging Dinosaurs. Perennial Library, 1990.