Cita APA

Pasachoff, J. M., & Pasachoff, J. M. (1987). Astronomy: From the earth to the universe (3. edition.). Philadelphia: Saunders.

Citación estilo Chicago

Pasachoff, Jay M., y Jay M. Pasachoff. Astronomy: From the Earth to the Universe. 3. edition. Philadelphia: Saunders, 1987.

Cita MLA

Pasachoff, Jay M., y Jay M. Pasachoff. Astronomy: From the Earth to the Universe. 3. edition. Philadelphia: Saunders, 1987.