APA (7th ed.) Citation

Smith, A. (1989). Mars: The next step. A. Hilger.

Chicago Style (17th ed.) Citation

Smith, Arthur. Mars: The Next Step. Bristol, England: A. Hilger, 1989.

MLA (9th ed.) Citation

Smith, Arthur. Mars: The Next Step. A. Hilger, 1989.

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