Walker, B.S., author
Crane Russak, 1975
Buku Teks
Hoggar, S.G., author
Cambridge University Press, 1992
Buku Teks
Wolfe, R. J., author
Oxford University Press, 2000
Buku Teks
Bethune, James D., author
Pearson-Prentice Hall, 2006
Buku Teks
Newman, William M., author
McGraw-Hill, 1979
Buku Teks