APA stil citiranja

Cowart, D., & Wymer, T. L. (1981). Twentieth-century American science-fiction writers: Twentieth-century American science-fiction writers. Detroit ; London: Gale Research.

Chicago stil citiranja

Cowart, David, and Thomas L. Wymer. Twentieth-century American science-fiction writers: Twentieth-century American science-fiction writers. Detroit ; London: Gale Research, 1981.

MLA stil citiranja

Cowart, David, and Thomas L. Wymer. Twentieth-century American science-fiction writers: Twentieth-century American science-fiction writers. Detroit ; London: Gale Research, 1981.