APA (7th ed.) Citation

Harris, G. (1983). The seventh gate (1st American ed.). Greenwillow Books.

Chicago Style (17th ed.) Citation

Harris, Geraldine. The Seventh Gate. 1st American ed. New York: Greenwillow Books, 1983.

MLA (9th ed.) Citation

Harris, Geraldine. The Seventh Gate. 1st American ed. Greenwillow Books, 1983.