Comeau, Raymond F.
Rinehart, and Winston, 1986
Buku Teks
Comeau, Raymond F.
Holt, Rinehart, and Winston, 1986
Buku Teks
Schoen, Sterling H
Richard D.Irwin, 1982
Buku Teks
Allen, Gemmy S., author
South-Western Cengage Learning, 2013
Buku Teks
Elsevier , 2000
Buku Teks