APA (7th ed.) Citation

Gentry, C., & Gibson-Downs, S. (1991). Greenberg's guide to Star trek collectibles. Greenberg Pub..

Chicago Style (17th ed.) Citation

Gentry, Christine, and Sally Gibson-Downs. Greenberg's Guide to Star Trek Collectibles. Sykesville, Md.: Greenberg Pub., 1991.

MLA (9th ed.) Citation

Gentry, Christine, and Sally Gibson-Downs. Greenberg's Guide to Star Trek Collectibles. Greenberg Pub., 1991.