APA (7th ed.) Citation

Hughes, C. C., McClymonds, J. W., & Waterman, S. D. (2008). Graded Memory Selections. Project Gutenberg.

Chicago Style (17th ed.) Citation

Hughes, Charles C., John William McClymonds, and S. D. Waterman. Graded Memory Selections. Project Gutenberg, 2008.

MLA (9th ed.) Citation

Hughes, Charles C., et al. Graded Memory Selections. Project Gutenberg, 2008.

Warning: These citations may not always be 100% accurate.