Carter, Norman H., author
Dickenson , [s.a.]
Buku Teks
Brandon, Dick H., author
Brandon/System Press, 1970
Buku Teks
Couger, J. Daniel, author
John Wiley & Sons, 1984
Buku Teks
Couger, J. Daniel, author
John Wiley & Sons, 1984
Buku Teks
McLeod, Raymond, author
John Wiley & Sons, 1982
Buku Teks