Silaban, Sintong, author
Pustaka Sinar Harapan, 1992
Buku Teks
Silaban, Sintong, author
Pustaka Sinar Harapan, 1996
Buku Teks
Universitas Indonesia, 1990
UI - Skripsi (Membership)
Artikel Jurnal
Sri Hartila, author
Universitas Indonesia, 2003
UI - Tesis (Membership)