Theodorson, George A
Buku Teks
Jary, David
Harper Collins, 1991
Buku Teks
G. Kartasapoetra, author
Bumi Aksara, 1992
Buku Referensi
Theodorson, George A., author
Barnes & Noble Books, 1969
Buku Referensi
edited by Henry Praty Fairchild
Littlefield, Adams & Co., 1962
Buku Referensi