Blanchard, Benjamin S., author
Pearson/Prentice Hall, 2004
Buku Teks
Ghiani, Gianpaolo, author
John Wiley & Sons, 2013
Buku Teks
Heskett, J.L.
The Ronald Press Comp., 1964
Buku Teks
Heshett, J.L.
The Ronald Press Comp., 1964
Buku Teks
Constantin, James A.
Appleton-Century-Crofts, 1966
Buku Teks