edited by Hal Porter
Rigby, 1972
Buku Teks
North, Robert C.
WW Norton, 1978
Buku Teks
Gebser, Martin
Morgan et Claypool, 2013
Buku Teks
Scaf, Alvin H.
California: Stanford University Press, 1955
Buku Teks
[publisher not identified], [date of publication not identified]
Buku Teks