Schnitzer, Martin C.
Rand McNally College Publishing , 1978
Buku Teks
Schnitzer, Martin C.
Honghton Miffn, 1987
Buku Teks
Schnitzer, Martin C.
South-Western , 1991
Buku Teks
McGraw-Hill, 1982
Buku Teks
Martin Basiang
Red & White Publishing, 2009
Buku Referensi