National Research Council (U.S.). Panel on Adolescent Pregnancy and Childbearing, ebrary, Inc, & Hayes, C. D. (1987). Risking the future: Adolescent sexuality, pregnancy, and childbearing. National Academy Press.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)National Research Council (U.S.). Panel on Adolescent Pregnancy and Childbearing, Inc ebrary, ба Cheryl D. Hayes. Risking the Future: Adolescent Sexuality, Pregnancy, and Childbearing. Washington, D.C.: National Academy Press, 1987.
MLA -ийн эшлэл (9 дэх хэвлэлт)National Research Council (U.S.). Panel on Adolescent Pregnancy and Childbearing, et al. Risking the Future: Adolescent Sexuality, Pregnancy, and Childbearing. National Academy Press, 1987.
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