Anderson, Ronald A., author
South-Western Publishing Co., 1972
Buku Teks
Ginger, Laura A.
Irwin , 1989
Buku Teks
Lavine, A. Lincoln
H. M. Rowe Co., 1959
Buku Teks
Anderson, Ronald A., author
South-Western Publishing Company, 1967
Buku Teks
Beatty, Jeffrey F.
Thomson, South-Western, 2003
Buku Teks