Hartley, John, author
Blackwell, 2008
eBooks
Dhake, Arvind M., author
McGraw-Hill, 1983
Buku Teks
edited by Ray Brown
Sage, 1976
Buku Teks
Wurtzel, Alan, author
McGraw-Hill, 1995
Buku Teks
Legge, James, author
[publisher not identified], [date of publication not identified]
Buku Referensi