APA
F Gary Cunningham Kenneth J Leveno Steven L Bloom, . (2018). Williams obstetrics. New York: McGraw Hill Education.
Chicago
F Gary Cunningham Kenneth J Leveno Steven L Bloom, . 2018. Williams obstetrics. New York: McGraw Hill Education.
Harvard
F Gary Cunningham Kenneth J Leveno Steven L Bloom, . (2018). Williams obstetrics. New York: McGraw Hill Education.
MLA
F Gary Cunningham Kenneth J Leveno Steven L Bloom, . Williams obstetrics. New York: McGraw Hill Education. 2018.
