Yang, Bo
Allen & Unwin, 1992
Buku Teks SO
Zainuddin Djafar
[publisher not identified], [date of publication not identified]
Buku Teks SO
I Putu Gede Ary Suta, 1958-
Yayasan SAD SATRIA BHAKTI Foundation, 2004
Buku Teks SO
Leo Suryadinata
ISEAS Publishing, 2015
eBooks
by United Nations Development Programme ILO
ILO UNDP , 1998
Buku Teks