APA (7th ed.) Citation

Langer, A., & Iffy, L. (1986). Extrauterine pregnancy. PSG Pub. Co..

Chicago Style (17th ed.) Citation

Langer, Alvin, and Leslie Iffy. Extrauterine Pregnancy. Littleton, Mass.: PSG Pub. Co., 1986.

MLA (8th ed.) Citation

Langer, Alvin, and Leslie Iffy. Extrauterine Pregnancy. PSG Pub. Co., 1986.