Marbun, B.N. (Benedictus Nahot), author
Pustaka Sinar Harapan, 2005
Buku Referensi
Zainul Bahri, author
Angkasa, 1993
Buku Referensi
Elliot, Florence, author
Penguin Books, 1957
Buku Referensi
Ilham Gunawan, author
Restu Agung, 1984
Buku Teks
Plano, Jack C., author
Rajawali, 1985
Buku Teks