Carter, Lief H.
Harpercollins , 1991
Buku Teks
Abdolah Tamher, author
Program Pascasarjana Universitas Indonesia, 2005
UI - Tesis (Membership)
Devol, Kenneth S., author
Hastings house Publisher, 1971
Buku Teks
Steiner, George A. (George Albert), 1912-, author
Random House, 1975
Buku Teks
Soderquist, Larry D.
Va. : Michie, c, 1991
Buku Teks