Keegan, Warren J.
Prehallindo , 1995
Buku Teks
Boyd, Harper W., Jr.
Erlangga, 2000
Buku Teks
Assuri, Sofjan
Rajawali, 1988
Buku Teks
Sofjan Assauri
[publisher not identified], [date of publication not identified]
Buku Teks
Keegan, Warren J.
Prenhallindo , 1996
Buku Teks