APA (7th ed.) Citation

Shakespeare, W. (2004). Sonnet #55. Project Gutenberg.

Chicago Style (17th ed.) Citation

Shakespeare, William. Sonnet #55. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Shakespeare, William. Sonnet #55. Project Gutenberg, 2004.

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