Benton, Michael
Longman , 1997
Buku Teks
Dolowitz, David A.
McGraw-Hill, 1964
Buku Teks
Moore, David S.
W.H. Freeman and Company, 2000
Buku Teks
Page, Geoff, author
Angus & Robertson, 1985
Buku Teks
Robert K. Murray [and others]; penerjemah, Andry Hartono
EGC, 1995
Buku Referensi