Cravalho, Ernest G., author
Pitman, 1981
Buku Teks
Spalding, D.B., author
The English Language, 1982
Buku Teks
Choudhury, T. Roy, author
Tata McGraw-Hill, 1973
Buku Teks
Benson, Rowland S., author
Pergemon Press, 1977
Buku Teks
Zemansky, Mark W. (Mark Waldo), 1900-, author
McGraw-Hill, 1975
Buku Teks