APA (7th ed.) Citation

Doyle, A. C. (2011). The Guards Came Through and Other Poems. Project Gutenberg.

Chicago Style (17th ed.) Citation

Doyle, Arthur Conan. The Guards Came Through and Other Poems. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Doyle, Arthur Conan. The Guards Came Through and Other Poems. Project Gutenberg, 2011.

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