APA (7th ed.) Citation

Gardner, J., & Antonucci, E. (1971). Grendel ([1st ed.].). Alfred A. Knopf.

Chicago Style (17th ed.) Citation

Gardner, John, and Emil Antonucci. Grendel. [1st ed.]. New York: Alfred A. Knopf, 1971.

MLA (9th ed.) Citation

Gardner, John, and Emil Antonucci. Grendel. [1st ed.]. Alfred A. Knopf, 1971.