Strohmer, Arthur F
Addison-Wesley , 1970
Buku Teks
edited by Bernard M. Bass and Samuel D. Deep
Prentice-Hall, 1970
Buku Teks
Myers, M. Scott, author
McGraw-Hill, 1981
Buku Teks
Gomez-Mejia, Luis R., author
Prentice-Hall, 1998
Buku Teks
Ryan, Thomas Arthur
The Ronald Company , 1954
Buku Teks