Wright, Charles Robert, author
Random House, 1975
Buku Teks
Tubbs, Stewart L., author
Random House, 1974
Buku Teks
Holland, Audrey L., author
Plural Publishing, 2007
Buku Teks
John Wiley & Son , 1996
Buku Teks
Ingeborg Breines, Robert Connell, Ingrid Eide
UNESCO, 2000
Buku Teks