APA (7th ed.) Citation

Baer, P. N., & Morris, M. L. (1977). Textbook of periodontics. Lippincott.

Chicago Style (17th ed.) Citation

Baer, Paul N., and Melvin L. Morris. Textbook of Periodontics. Philadelphia: Lippincott, 1977.

MLA (9th ed.) Citation

Baer, Paul N., and Melvin L. Morris. Textbook of Periodontics. Lippincott, 1977.