Kraus, Bertram S.
Harper & Row, 1964
Buku Teks
Groot, Gerard J.
Columbia University Press, 1951
Buku Teks
McKee, Jeffrey K., author
Pearson/Prentice Hall, 2005
Buku Teks
Eckhardt, Robert B., author
McGraw-Hill, 1979
Buku Teks
Pawson, Ivan G., author
John Wiley & Sons, 1977
Buku Teks