Schnitzer, Martin C.
Rand McNally College Publishing , 1978
Buku Teks
Martin Basiang
Red & White Publishing, 2009
Buku Referensi
Boone, Louis E.
Dryden Press, 1996
Buku Teks
Boone, Louis E.
Dryden Press, 1990
Buku Teks
Abrahamsen, Martin A.
McGraw-Hill, 1976
Buku Teks