APA (7th ed.) Citation

Johnson, S., & Longfellow, S. (2010). Book of Hymns for Public and Private Devotion. Project Gutenberg.

Chicago Style (17th ed.) Citation

Johnson, Samuel, and Samuel Longfellow. Book of Hymns for Public and Private Devotion. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Johnson, Samuel, and Samuel Longfellow. Book of Hymns for Public and Private Devotion. Project Gutenberg, 2010.

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