Agus Mulyana
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1996
UI - Tesis Membership
edited by Gordon Greenwood and Norman Harper
F.W. Cheshire, 1957
Buku Teks
Lovering, T.S.
Prentice-Hall, 1943
Buku Teks
Cheshire, 1974
Buku Teks
edited by Gordon Greenwood and Norman Harper
F.W. Chesire, 1968
Buku Teks