APA (7th ed.) Citation

Swenson, B., & Swenson, A. (1979). A source book of urban plans for fantasy roleplaying. [Barbara Swenson].

Chicago Style (17th ed.) Citation

Swenson, Barbara, and Anders Swenson. A Source Book of Urban Plans for Fantasy Roleplaying. [California?]: [Barbara Swenson], 1979.

MLA (9th ed.) Citation

Swenson, Barbara, and Anders Swenson. A Source Book of Urban Plans for Fantasy Roleplaying. [Barbara Swenson], 1979.