Kellerman, Henry
Allyn and Bacon, 1997
Buku Teks
edited by Gregory J. Boyle, Donald H. Saklofske, Gerald Matthews
Academic Press, 2015
eBooks
Groth-Marnat, Gary
John Wiley & Sons, 1990
Buku Referensi
Groth-Marnat, Gary
John Wiley & Sons, 2016
Buku Teks
Gilbert, Joseph
Van Nostrand Reinhold, 1978
Buku Teks