Homans, George Caspar, 1910-1989, author
Transactions Books, 1984
Buku Teks
Collins, Aukai, author
Hikmah , 2006
Buku Teks
Ferraro, Geraldine, author
Bantam Books, 1985
Buku Teks
Luthuli, Albert
Collins, 1962
Buku Teks
Powell, Colin L., author
Angkasa, 2001
Buku Teks