Steinby, Torsten, author
Government, 1971
Buku Teks
Bovee, Courtland L., author
Pearson/Prentice Hall, 2007
Buku Teks
edited by W. T. Singleton
MTP Press Limited, 1979
Buku Teks
Shiller, Larry, author
Yourdon Press, 1990
Buku Teks
Zenithesa Gifta Nadirini, author
Fakultas Ilmu Keperawatan Universitas Indonesia, 2015
UI - Skripsi (Membership)