Newstrom, John W.
McGraw-Hill, 1995
Buku Teks
Fairhead, J. N.
English Universities Press, 1965
Buku Teks
Gallwey, Timothy Josep
CRC Press, Taylor & Francis Group, 2009
Buku Teks
Sousa, John J.
Rhode Island Consortium, 1990
Buku Teks
Harley, John P.
McGraw-Hill Book, 2000
Buku Teks