APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.