Viertl, Reinhard
CRC Press, 1996
Buku Teks
Robert, Harry V., author
McGraw-Hill, 1982
Buku Teks
Sharon Anderson [and others]
John Wiley & Sons, 1980
Buku Teks
Snedecor, George W., author
The Iowa State University Press, 1964
Buku Teks
Fisher, Ronald A., author
Hafner Press, 1970
Buku Teks