edited by John Lack and Jacqueline Templeton
The University of Melbourne, 1988
Buku Teks
Clark, Manning, 1915-1991
Oxford University Press, 1957
Buku Teks
Sastri, K.A. Nilakanta
University of Madras, 1946
Buku Teks SO
Caenegem, R.C. van
North-Holland Publishing, 1978
Buku Teks SO
Aris Ananta
Demographic Institute, Faculty of Economics, University of Indonesia, 1995
Buku Teks