APA (7th ed.) Citation

Ritchie, W., & Hoffman, R. J. (1985). A tale of two books. The Book Collectors.

Chicago Style (17th ed.) Citation

Ritchie, Ward, and Richard J. Hoffman. A Tale of Two Books. Los Angeles: The Book Collectors, 1985.

MLA (9th ed.) Citation

Ritchie, Ward, and Richard J. Hoffman. A Tale of Two Books. The Book Collectors, 1985.