Spiro, Herbert T.
John Wiley & Sons, 1978
Buku Teks
Spiro, Herbert J
Van Nostrand Reinhold, 1969
Buku Teks
Hicks, Ursula K., author
Clarendon Press, 1969
Buku Teks
Yosie Octavia, author
Universitas Indonesia, 2009
UI - Tesis (Membership)
Spiro, Melford E.
Harvard University Press , 1956
Buku Teks