Jacobstein, J. Myron
Foundation press, 1979
Buku Teks
Frazer, James George, Sir, 1854-1941, author
New American Library, 1959
Buku Teks
Smith, Mable H., author
Lippincott Wiliams & Wilkins, 2005
Buku Teks
Philip G. Schrag
Little,Brown and Company, 1974
Buku Teks
E. Saefullah Wiradipradja, author
Regional Institute of Higher Education and Development , 1976
Buku Teks