Harman, Willis, author
Berrett-Koehler , 1998
Buku Teks
Korten, David C., author
Kumarian Press, 1990
Buku Teks
edited by Jon Bird ... [et al.]
Routledge, 1993
Buku Teks
Korten, David C., author
Yayasan Obor Indonesia, 2002
Buku Teks
Korten, David C., author
Yayasan Obor Indonesia, 2001
Buku Teks