APA (7th ed.) Citation

Heine, H., & Lazarus, E. (2010). Poems and Ballads of Heinrich Heine. Project Gutenberg.

Chicago Style (17th ed.) Citation

Heine, Heinrich, and Emma Lazarus. Poems and Ballads of Heinrich Heine. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Heine, Heinrich, and Emma Lazarus. Poems and Ballads of Heinrich Heine. Project Gutenberg, 2010.

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