Johnson, George B.
the Living world
McGraw-Hill, Higher Education, 2008
 Buku Teks
Johnson, George B.
The Living world
McGraw-Hill, 2003
 Buku Teks
Johnson, George B.
The living world
McGraw-Hill, 2012
 Buku Teks
Johnson, George B.
The living world
McGraw-Hill, 2018
 Buku Teks
Gestalt therapy around the world
Eleanor O'Leary.
Wiley-Blackwell, 2013
 Buku Teks