APA (7th ed.) Citation

Carlyle, T., & Shepherd, R. H. (2004). On the Choice of Books. Project Gutenberg.

Chicago Style (17th ed.) Citation

Carlyle, Thomas, and Richard Herne Shepherd. On the Choice of Books. Project Gutenberg, 2004.

MLA (9th ed.) Citation

Carlyle, Thomas, and Richard Herne Shepherd. On the Choice of Books. Project Gutenberg, 2004.

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