APA (7th ed.) Citation

Fowler, O. S., Fowler, L. N., & Kirkham, S. (1837). Phrenology proved. Printed for the authors, by W. H. Coyler.

Chicago Style (17th ed.) Citation

Fowler, O. S., L. N. Fowler, and Samuel Kirkham. Phrenology Proved. New-York: Printed for the authors, by W. H. Coyler, 1837.

MLA (8th ed.) Citation

Fowler, O. S., et al. Phrenology Proved. Printed for the authors, by W. H. Coyler, 1837.