Shukla, R. C. N.
McGraw-Hill , 1987
Buku Teks
Niniel Fitriyanti, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1991
UI - Skripsi Membership
by Herbert S. Denenberg ... [et al.]
Prentice-Hall, 1964
Buku Teks
Athern, James L., author
West , 1989
Buku Teks
Willett, Allan H., author
University of Pennsylvania Press, 1951
Buku Teks