Hellman, H. (1975). Psychosocial and cultural determinants of population policy. Interdisciplinary Communications Program.
Chicago-viite (17. p.)Hellman, Hal. Psychosocial and Cultural Determinants of Population Policy. Washington: Interdisciplinary Communications Program, 1975.
MLA-viite (9. p.)Hellman, Hal. Psychosocial and Cultural Determinants of Population Policy. Interdisciplinary Communications Program, 1975.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.