Halpin, Daniel W.
John Wiley & Sons, 1980
Buku Teks
compiled by David R. Hampton
Prentince-Hall of India, 1979
Buku Teks
Barrie, Donald S.
McGraw-Hill, 1978
Buku Teks
Clough, Richard Hudson
John Wiley & Sons, c1991
Buku Teks
Murdoch, John
Spon Press, 2000
Buku Teks