Katz, Jerrold J., author
George Allen and Unwin, 1972
Buku Teks
Bloomfield, Leonard, author
Holt, Rinehart and Winston, 1961
Buku Teks
Archipelago Press , 1998
Buku Teks
Lado, Robert
University of Michigan, 1957
Buku Teks
Beard, Adrian, author
Routledge, 2004
Buku Teks