APA (7th ed.) Citation

Silver, N. (1992). Pterodactyls. [o.V.].

Chicago Style (17th ed.) Citation

Silver, Nicky. Pterodactyls. [o.O.]: [o.V.], 1992.

MLA (8th ed.) Citation

Silver, Nicky. Pterodactyls. [o.V.], 1992.

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