APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (8:e uppl.)

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