APA (7th ed.) Citation

Stephens, C. P. (1991). A checklist of the Tor doubles. Ultramarine.

Chicago Style (17th ed.) Citation

Stephens, Christopher P. A Checklist of the Tor Doubles. Hastings-On-Hudson, NY: Ultramarine, 1991.

MLA (9th ed.) Citation

Stephens, Christopher P. A Checklist of the Tor Doubles. Ultramarine, 1991.