Cita APA (7th ed.)

Sommer, R. F., Ostrander, F. D., & Crowley, M. C. (1956). Clinical endodontics; a manual of scientific endodontics. Saunders.

Cita Chicago (17th ed.)

Sommer, Ralph Frederick, F. Darl Ostrander, i Mary C. Crowley. Clinical Endodontics; a Manual of Scientific Endodontics. Philadelphia: Saunders, 1956.

Cita MLA (9th ed.)

Sommer, Ralph Frederick, et al. Clinical Endodontics; a Manual of Scientific Endodontics. Saunders, 1956.