Lowndes, Douglas
Pergamon Press , 1969
Buku Teks
edited by Victor P. Buel and Carl Heyel
McGraw-Hill, c1970
Buku Teks
Westing, John Howard, author
Macmillan, c1975
Buku Teks
edited by Edward C. Bursk and John F. Chapman
New American Library, 1964
Buku Teks
Cundiff, Edward W., author
Prentice-Hall of India, 1980
Buku Teks