selected and introduced by Roy Harris
Routledge/Thoemmes Press, 1995
Buku Referensi
Sapir, Edward
University of California Press, 1949
Buku Teks
Frederovk A. Praeger, 1967
Buku Teks
The University of Massachusetts Pres, 1981
Buku Teks
Mottola, Robert, author
Osborne/McGraw-Hill, 1982
Buku Teks