Tan, Kim-huon
Regional Institute of Higher Education and Development, 1974
Buku Teks
edited by Severin Daum
Charles University, 2003
Buku Teks
Edward Shils
University of Chicago Press, 1976
Buku Teks
Federal Republic, author
Wiesbaden : Wiesbadener Graphische Betriebe GmbH, 1977
Buku Referensi
Kohlhammer, 1961
Buku Teks