Buffa, Elwood S. (Elwood Spencer), author
Erlangga, 1984
Buku Teks
Buffa, Elwood S. (Elwood Spencer), author
John Wiley & Sons, 1975
Buku Teks
Buffa, Elwood S. (Elwood Spencer)
Binarupa Aksara, 1999
Buku Teks
Radford, J.D., author
Macmillan, 1972
Buku Teks
compiled by David R. Hampton
Prentince-Hall of India, 1979
Buku Teks