Warnick, Barbara, 1946-, author
Macmillan, 1994
Buku Teks
Inch, Edward S., author
Pearson Education, 2015
Buku Teks
Bruner, Jerome, author
John Wiley & Sons, 1956
Buku Teks
Nadler, Gerald
California Prima Publishing 1998.,
Buku Teks
Warburton, Nigel, 1962-
Routledge, 1996
Buku Teks