APA (7th ed.) Citation

Lovecraft, H. P., Kleiner, R., Lockhart, A. F., & Long, F. B. (2009). Writings in the United Amateur, 1915-1922. Project Gutenberg.

Chicago Style (17th ed.) Citation

Lovecraft, H. P., Rheinhart Kleiner, Andrew Francis Lockhart, and Frank Belknap Long. Writings in the United Amateur, 1915-1922. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Lovecraft, H. P., et al. Writings in the United Amateur, 1915-1922. Project Gutenberg, 2009.

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