Piramdia, 2004
Buku Teks
Morgan, Kenneth W., author
Pustaka Jaya, 1980
Buku Teks
Konopacki, Maciej
[publisher not identified], [date of publication not identified]
Buku Teks
[publisher not identified], [date of publication not identified]
Buku Teks
Morgan, Kenneth W., author
Pembangunan, 1963
Buku Teks