Nugent William R., author
Thomson Learning, 2001
Buku Teks
Patton, Michael Quinn, author
SAGE, 2015
Buku Teks
Bingham, Robert C., author
McGraw-Hill, 1987
Buku Teks
Carman, Robert A., author
John Wiley & Sons, 1981
Buku Teks
Edited by A.D. Boardman
John Wiley & Sons, 1980
Buku Teks