APA (7th ed.) Citation

Whitney, H. H., & Horn, L. V. (2013). Herbs and Apples. Project Gutenberg.

Chicago Style (17th ed.) Citation

Whitney, Helen Hay, and Lucretia Van Horn. Herbs and Apples. Project Gutenberg, 2013.

MLA (9th ed.) Citation

Whitney, Helen Hay, and Lucretia Van Horn. Herbs and Apples. Project Gutenberg, 2013.

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