Kennedy, Raymond
[publisher not identified], [date of publication not identified]
Buku Teks
Springer, 2007
Buku Teks
Parrillo, Vincent N., author
Pearson, 2014
Buku Teks
edited by Astri Suhrkel and Lela Garner Noble
Frederick A. Praeger, 1977
Buku Teks
The Unesco Press, 1974
Buku Teks