edited by William H. Allaway
Westview Press, 1985
Buku Teks
Wiranda G. Piliang, Lukman Rahardja, editor
Life Science Inter University Center, Faculty of Graduate Studies, Bogor Agricultural University, 1990
Buku Referensi
Majault, Joseph
UNESCO, 1963
Buku Teks
Riesman, David, author
McGraw-Hill, 1975
Buku Teks
Indonesia. Departemen Pendidikan dan Kebudayaan
Departemen Pendidikan dan Kebudayaan , 1992
Buku Referensi