Kuther, Tara L., author
Wadsworth/Cengage Learning, 2013
Buku Teks
edited Edward Cornish
World Future Society, 1988
Buku Teks
Nevid, Jeffrey S.
Pearson Education International, 2008
Buku Teks
Westview Press, 1978
Buku Teks
Edited, Dorojatun Kuntjoro-Jakti; Keiji Omura
Institute of Developing Economies, 1995
Buku Teks