Padgett, Stephen
Longman, 1991
Buku Teks
Upham, Frank K
Harvard University Press, 1987
Buku Teks
Eto, Jun
International Society for Educationa Information, 1974
Buku Teks
Krauss, Ellis S.
University of California Press, 1974
Buku Teks
Scalapino, Robert A., author
University of California Press, 1953
Buku Teks