Hariyah, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2016
UI - Tesis Membership
Kalvelage, Carl, author
Foresman, 1976
Buku Teks
McDowell, W. H., author
Longman, 2002
Buku Teks
Ferre, John P., author
Charles E. Merrill Pub. Co., 1983
Buku Referensi
Denscombe, Martyn, author
Open University Press, 2012
Buku Teks