Pastier, John
Whitney Library of Design, 1980
Buku Teks
Canavan, P. Joseph
D.C. Health and Company, 1990
Buku Teks
Bradbrook, Muriel Clara, 1909-1993
Cambridge University Press, 1980
Buku Teks
Roberts, Edgar V.
Prentice-Hall, 1969
Buku Teks
edited by Eric P. Hamp
Mouton, 1973
Buku Teks