APA (7th ed.) Citation

Abell. (1987). Exploration of the universe (5th edition.). Saunders College Publishing.

Chicago Style (17th ed.) Citation

Abell. Exploration of the Universe. 5th edition. Philadelphia: Saunders College Publishing, 1987.

MLA (8th ed.) Citation

Abell. Exploration of the Universe. 5th edition. Saunders College Publishing, 1987.

Warning: These citations may not always be 100% accurate.