Stewart, Rosemary, author
Prentice-Hall, 1982
Buku Teks
Stewart, Rosemary, author
Prentice-Hall, 1982
Buku Teks
Webber, Ross A., author
Richard D. Irwin, 1981
Buku Teks
United Nations Population Fund
UNFPA, 1994
Buku Teks
Mooney, Gavin H., author
MacMillan Press , 1980
Buku Teks