editor, Oliva Blanchette, Tomonobu Imamich, George F. McLean, Togi M. P. Pangaribuan
The Council for Research in Values and Philosophy , 2001
Buku Teks SO
edited by Chia Siow Yue
ASEAN Economic Research Unit, Institute of Southeast Asian Studies, 1994
Buku Teks SO
edited by Oliva Blanchette, Tomonobu Imamich and George F. McLean
Council for Research in Values and Philosophy, 2001
Buku Teks SO
Carty, Barbara
Springer Publishing, 2000
Buku Teks SO
[edited by] Virginia K. Saba, Kathleen A. McCormick
McGraw-Hill , 2006
Buku Teks SO