Lucy, Richard, author
Macmillan, 1985
Buku Teks
Bayu Kusuma Yuda, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2010
UI - Skripsi (Open)
Longman Chesire, 1988
Buku Teks
Crisp, L. F. (Leslie Finlay), author
Yale University Press, 1949
Buku Teks
Jaensch, Dean Harold
[publisher not identified], 1977
Buku Teks