Hunt, R. Reed, author
McGraw-Hill, 1999
Buku Teks
Solso, Robert L., 1933-, author
Pearson/A and B, 2005
Buku Teks
edited by Janak Pandey, Durganand Sinha, Dharm P.S. Bhawuk
Sage, 1996
Buku Teks
Fuad Hassan, author
[publisher not identified], [date of publication not identified]
Buku Teks
Drever, James, author
Bina Aksara, 1986
Buku Referensi