Siregar, Ashadi
Pustaka Pelajar, 1998
Buku Teks
Pinus, 2005
Buku Teks
Umar Junus, author
Gramedia , 1985
Buku Teks
Nurhayati Rahman, author
Universitas Indonesia, 1998
UI - Disertasi (Membership)
Maman Soetarman Mahayana, author
Yayasan Indonesiatera, 2001
Buku Teks