Cita APA (7a ed.)

Abell, G., Morrison, D., & Wolf, S. (1993). Exploration of the universe. Saunder College Publ.

Cita Chicago Style (17a ed.)

Abell, George, David Morrison, y Sidney Wolf. Exploration of the Universe. Philadelphia: Saunder College Publ, 1993.

Cita MLA (9a ed.)

Abell, George, et al. Exploration of the Universe. Saunder College Publ, 1993.