Luthans, Fred, author
Macmillan, 1976
Buku Teks
Hansen, Harry L., author
Richard D. Irwin, 1964
Buku Teks
Hansen, Harry L., author
Richard D. Irwin, 1956
Buku Teks
Gibson, William E., author
McGraw-Hill, 1971
Buku Teks
Mansfield, Edwin, author
W.W. Norton, [date of publication not identified]
Buku Teks