Jones, Howard, author
Oxford Unioversity Press, 2003
Buku Teks
Rowe, John, author
Time-Life Books, 1987
Buku Teks
McKay, Gary
Allen & Unwin Australia, 1987
Buku Teks
edited by W. Scott Thompson and Donaldson D. Frizzell
Crane, Russak, 1977
Buku Teks
Chen, Min, author
Lynne Rienner Publishers, 1992
Buku Teks