Lado, Robert, author
University of Michigan, 1957
Buku Teks
edited by Anne E. Baker and Kees Hengeveld
Wiley-Blackweell, 2012
Buku Teks
edited by Archibald A. Hill
Voice of America, 1969
Buku Teks
edited by Archibald A. Hill
[Publisher not identified], 1969
Buku Teks
Malmkjaer, Kirsten
University Press, 2007
Buku Teks