Gaya APA

Peterson, J, H, E. (2018). Medical Disorders in Pregnancy, An Issue of Obstetrics and Gynecology Clinics . : Elsevier.

Gaya MLA

Peterson, Judith, Hibbard,, Erika. "Medical Disorders in Pregnancy, An Issue of Obstetrics and Gynecology Clinics". : Elsevier, 2018. Text.