Welsch, Glenn A., author
Learning System Company, 1977
Buku Teks
Anthony, Robert N. (Robert Newton), 1916-2006, author
Richard D. Irwin, 1974
Buku Teks
Edwards, James Don, author
Richard D. Irwin, 1968
Buku Teks
Smith, Jay M., author
South-Western Publishing, 1982
Buku Teks
Simons, Harry, author
South-Western Publishing, 1977
Buku Teks