Simons, Ronald L., author
Macmillan, 1985
Buku Teks
Howlett, Bernadette
MA Jones Bartlett Learning, 2014
Buku Teks
Springer, 2012
eBooks
Collier, Gary, author
John Wiley & Sons, 1994
Buku Teks
edited by Henry Wechsler, Leonard Solomon, Bernard M. Kramer
Holt, Rinehart and Winston, 1970
Buku Teks