Gilbert, Scott F., author
Sinauer Associates, 1994
Buku Teks
Gilbert, Scott F., author
Sinauer Associattes, 2000
Buku Teks
Gilbert, Scott F., author
Massachusetts Sinauer Associates, Inc., 2016
Buku Teks
Strommen, Ellen A., author
Dorsey Press, 1983
Buku Teks
Dante Cicchetti
John Wiley & Sons, Inc. , 2016
Buku Teks