Wonnacott, Paul, author
John Wiley & Sons, 1990
Buku Teks
Albrecht, William P., author
Prentice-Hall, 1979
Buku Teks
edited by Nancy D. Ruggles
Prentice-Hall, 1970
Buku Teks
Simanjuntak, Herpinus, author
Kesaint Blanc, 2010
Multimedia
Simanjuntak, Herpinus, author
Kesaint Blanc, 2010
Multimedia