Cita APA

Covington, E., & Covington, E. (1948). The efficient dental assistant (2. edition.). Louisiana: C.V. Mosby.

Citación estilo Chicago

Covington, Ethel, y Ethel Covington. The Efficient Dental Assistant. 2. edition. Louisiana: C.V. Mosby, 1948.

Cita MLA

Covington, Ethel, y Ethel Covington. The Efficient Dental Assistant. 2. edition. Louisiana: C.V. Mosby, 1948.