Cita APA (7a ed.)

(1990). 1990 Physicians' desk reference (44th ed.). Barnhart.

Cita Chicago Style (17a ed.)

1990 Physicians' Desk Reference. 44th ed. New Jersey: Barnhart, 1990.

Cita MLA (9a ed.)

1990 Physicians' Desk Reference. 44th ed. Barnhart, 1990.