by Dale H. Besterfield ... [and others]
Prentice-Hall, 1995
Buku Teks
Soin, Sarv Singh, author
McGraw-Hill, 1992
Buku Teks
Soin, Sarv Singh, author
McGraw-Hill, 1993
Buku Teks
Tarigan, Rostiana, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2005
UI - Tesis (Membership)
Bank, John, author
Prentice-Hall, 2000
Buku Teks