Gill, Brendan
Harry N. Abraham, inc., 1981
Buku Teks
Siswanto, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2008
UI - Disertasi (Open)
Minderop, Albertine, author
1988
UI - Tesis (Membership)
Kennedy, John H., author
Saunders College, 1990
Buku Teks
Kennedy, John, author
Hutchinson, 1957
Buku Teks