APA (7th ed.) Citation

(2013). Christmas in Poetry Carols and Poems. Project Gutenberg.

Chicago Style (17th ed.) Citation

Christmas in Poetry Carols and Poems. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Christmas in Poetry Carols and Poems. Project Gutenberg, 2013.

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