APA (7th ed.) Citation

Branley, F. M., & Maestro, G. (1984). Comets. Crowell.

Chicago Style (17th ed.) Citation

Branley, Franklyn Mansfield, and Giulio Maestro. Comets. New York: Crowell, 1984.

MLA (9th ed.) Citation

Branley, Franklyn Mansfield, and Giulio Maestro. Comets. Crowell, 1984.