Gaya APA

G.Briggs, G., Freeman, R, K. (2011). Drugs in Pregnancy and Lactation : A reference guide to fetal and neonatal risk Ed 9 (9). : Lippincott Williams & Wilkins.

Gaya MLA

G.Briggs, Gerald., Freeman, Roger, K.. "Drugs in Pregnancy and Lactation : A reference guide to fetal and neonatal risk Ed 9". 9 : Lippincott Williams & Wilkins, 2011. Text.