APA (7th ed.) Citation

Fowler, L. N., & Fowler, O. S. (2010). The Illustrated Self-Instructor in Phrenology and Physiology. Project Gutenberg.

Chicago Style (17th ed.) Citation

Fowler, L. N., and O. S. Fowler. The Illustrated Self-Instructor in Phrenology and Physiology. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Fowler, L. N., and O. S. Fowler. The Illustrated Self-Instructor in Phrenology and Physiology. Project Gutenberg, 2010.

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