APA (7th ed.) Citation

Smith, C. A., Lovecraft, H. P., & Behrends, S. (1987). Clark Ashton Smith: Letters to H. P. Lovecraft. Necronomicon Press.

Chicago Style (17th ed.) Citation

Smith, Clark Ashton, H. P. Lovecraft, and Steve Behrends. Clark Ashton Smith: Letters to H. P. Lovecraft. West Warwick, Rhode Island: Necronomicon Press, 1987.

MLA (9th ed.) Citation

Smith, Clark Ashton, et al. Clark Ashton Smith: Letters to H. P. Lovecraft. Necronomicon Press, 1987.