edited by William Petersen
Macmillan, 1972
Buku Teks
Thompson, Warren S., author
McGraw-Hill, 1970
Buku Teks
Smith, T. Lynn
J. B. Lippincott Company, 1960
Buku Teks
United Nations Fund for Population Activities, 1985
Buku Teks
Malthus, Thomas
Oxford University Press, 1993
Buku Teks