Gaya APA

al., G, E, B, E. (1990). A practical approach to pediatric endocrinology. -- 3rd ed. . Chicago: Year Book Medical Pub., Inc..

Gaya MLA

al., Gerge, E., Bacon,, Et.. "A practical approach to pediatric endocrinology. -- 3rd ed.". Chicago: Year Book Medical Pub., Inc., 1990. Text.