Rahman Shaari
GAPENA, 1998
Buku Teks
M. Isa Sulaiman
[publisher not identified], [date of publication not identified]
Buku Teks
editor, Neta S. Pane; pengantar, Herawati Diah
Pustaka Spirit, 2009
Buku Referensi
Kerry B. Collison
Sid Harta Publisher, 1997
Buku Teks SO
Djopari, Johannes Rudolf Gerzon
Gramedia Widiasarana Indonesia, 1995
Buku Teks SO