APA
William Sears M., . (1989). Your Baby: the First twelve Months. New York: Barron´s.
Chicago
William Sears M.D, . 1989. Your Baby: the First twelve Months. New York: Barron´s.
Harvard
William Sears M., . (1989). Your Baby: the First twelve Months. New York: Barron´s.
MLA
William Sears M.D, . Your Baby: the First twelve Months. New York: Barron´s. 1989.
