Geer, John Gray
Gateways to democracy: an introduction to American government
Wadsworth and Cengage Learning, 2012
 Buku Teks
Coon, Dennis
Introduction to psychology: gateways to mind and behavior
Wadsworth , 2001
 Buku Teks
Coon, Dennis
Introduction to psychology : gateways to mind and behavior
MA Cengage Learning, 2016
 Buku Teks
Gateways to democracy : an introduction to American government : the essentials
by John G. Geer [and others]
Wadsworth and Cengage Learning, 2012
 Buku Teks
Rolls, Eric
Celebration of the senses / Eric Rolls
First Publisher, 1984
 Buku Teks