APA (7th ed.) Citation

Elkins, C., & Greenberg, M. H. (1992). Robert Silverberg's many trapdoors: Critical essays on his science fiction. Greenwood Press.

Chicago Style (17th ed.) Citation

Elkins, Charles, and Martin Harry Greenberg. Robert Silverberg's Many Trapdoors: Critical Essays on His Science Fiction. Westport, Conn.: Greenwood Press, 1992.

MLA (9th ed.) Citation

Elkins, Charles, and Martin Harry Greenberg. Robert Silverberg's Many Trapdoors: Critical Essays on His Science Fiction. Greenwood Press, 1992.