Pulungan, Ismail, author
[publisher not identified], 1992
Buku Referensi
R. Subekti, 1914-, author
Pradnya Paramita, 1983
Buku Teks
Sembiring, Sentosa, author
Citra Aditya Bakti, 1992
Buku Teks
Mitra Info, 1995
Buku Teks
Siregar, Ahmad Chairun, author
Universitas Indonesia, 1983
UI - Skripsi (Membership)