APA (7th ed.) Citation

Parker, R., & Ridley, T. (1971). Spell seven ([1st U.S. ed.].). T. Nelson.

Chicago Style (17th ed.) Citation

Parker, Richard, and Trevor Ridley. Spell Seven. [1st U.S. ed.]. New York: T. Nelson, 1971.

MLA (9th ed.) Citation

Parker, Richard, and Trevor Ridley. Spell Seven. [1st U.S. ed.]. T. Nelson, 1971.