edited by Edmund Ronald Leach
Cambridge University Press, 1969
Buku Teks
Hutton, J.H.
Cambridge University Press , 1946
Buku Teks
United Nations
Buku Teks
Sri Poedjastoeti
Lembaga Demografi Fakultas Ekonomi Universitas Indonesia, 1991
Buku Teks
edited by Graham S. Gibbard, John J. Hartman, Richard D. Mann
Jossey-Bass, 1976
Buku Teks