edited by Harry W. Karn, B. von Haller Gilmer
McGraw-Hill, 1962
Buku Teks
edited by Harry W. Karn and B. von Haller Gilmer
McGraw-Hill, 1962
Buku Teks
Laird, Donald A.
McGraw-Hill, 1958
Buku Teks
Abd. Ghonie Abubakar
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1997
UI - Tesis Membership
McKenna, Eugene
Psychology Press, 2000
Buku Referensi