Kang, K. W. (1973). A study on the interrelationships between lactation and postpartum amenorrhea. Korean Institute for Family Planning.
Chicago-viite (17. p.)Kang, Kil Won. A Study on the Interrelationships Between Lactation and Postpartum Amenorrhea. Seoul: Korean Institute for Family Planning, 1973.
MLA-viite (9. p.)Kang, Kil Won. A Study on the Interrelationships Between Lactation and Postpartum Amenorrhea. Korean Institute for Family Planning, 1973.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.