Weingarten, Henry
McGraw-Hill , 1996
Buku Teks
Beck, Roger
Blackwell Publishing, 2007
Buku Teks
Foreman, Patricia L.
Good Earth Publications , 1992
Buku Teks
Ho, Peng Yoke
RoutledgeCurzon, 2003
Buku Teks
[publisher not identified], [date of publication not identified]
Naskah