Cita APA (7a ed.)

(1989). U.S. medical directory (8th ed.). U.S. Directory Service.

Cita Chicago Style (17a ed.)

U.S. Medical Directory. 8th ed. Miami, Fla.: U.S. Directory Service, 1989.

Cita MLA (8a ed.)

U.S. Medical Directory. 8th ed. U.S. Directory Service, 1989.