APA (7th ed.) Citation

Protheroe, W. M., Capriotti, E. R., & Newsom, G. H. (1984). Exploring the universe (3. ed.). Merrill.

Chicago Style (17th ed.) Citation

Protheroe, W. M., E. R. Capriotti, and G. H. Newsom. Exploring the Universe. 3. ed. Columbus, Ohio: Merrill, 1984.

MLA (9th ed.) Citation

Protheroe, W. M., et al. Exploring the Universe. 3. ed. Merrill, 1984.