Hillier, Susan, author
Wadsworth and Cengage Learning, 2011
Buku Teks
Hampton, John K., author
Wm. C. Brown, 1997
Buku Teks
edited by Fergus L.M. Craik, Timothy A. Salthouse
Lawrence Erlbaum, 1992
Buku Teks
edited by Clark Tibbitts and Wilma Donahue
Prentice-Hall, 1960
Buku Teks
Burdman, Geri Marr, author
Prentice-Hall, 1986
Buku Teks