Rogers, G.F.C. (Gordon Frederick Crichton)
Longmans, 1967
Buku Teks
Roberts, J.K.
ELBS, 1962
Buku Teks
Zemansky, Mark Waldo, 1900-
McGraw-Hill, 1957
Buku Teks
Balzhiser, Richard E.
Prentice Hall of India, 1977
Buku Teks
Haberman, William L., 1922-
Boston: Allyn and Bacon, 1980
Buku Teks