APA (7th ed.) Citation

Gray, T., Rolfe, W. J., & Carruthers, R. (2009). Select Poems of Thomas Gray. Project Gutenberg.

Chicago Style (17th ed.) Citation

Gray, Thomas, W. J. Rolfe, and Robert Carruthers. Select Poems of Thomas Gray. Project Gutenberg, 2009.

MLA (9th ed.) Citation

Gray, Thomas, et al. Select Poems of Thomas Gray. Project Gutenberg, 2009.

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