Groth-Marnat, Gary, author
John Wiley & Sons, 1990
Buku Referensi
edited by Curtiss P. Hansen and Kelley A. Conrad
Quorum Books , 1991
Buku Referensi
Groth-Marnat, Gary, author
John Wiley & Sons, 2016
Buku Teks
Aiken, Lewis R., author
Allyn and Bacon, 1997
Buku Teks
Sattler, Jerome M., author
Jerome M. Sattler, 1988
Buku Teks