APA (7th ed.) Citation

Johnson, J. W., & Matthews, B. (2006). Fifty years and Other Poems. Project Gutenberg.

Chicago Style (17th ed.) Citation

Johnson, James Weldon, and Brander Matthews. Fifty Years and Other Poems. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Johnson, James Weldon, and Brander Matthews. Fifty Years and Other Poems. Project Gutenberg, 2006.

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