Sembiring, R.K., author
ITB Press, 1995
Buku Teks
Ratno Dwi Santoso, author
Andi, 1992
Buku Teks
Universitas Indonesia, 2006
UI - Skripsi (Membership)
Sugiarto, author
Andi , 1992
Buku Teks
Kerlinger, Fred N. (Fred Nichols), 1910-, author
Nur Cahaya, 1987
Buku Teks