Jones, Harry, 1911-, author
Gower Press , 1974
Buku Teks
Le Breton, Preston P.
Englewood Cliffs, 1961
Buku Teks
Hitt, Michael A., author
Cengage Learning, 2015
Buku Teks
Ayres, Robert U., author
McGraw-Hill, 1969
Buku Teks
CCH Australia Limited, 1990
Buku Teks