Stoodley, K.D.C., author
John Wiley & Sons, 1980
Buku Teks
Snedecor, George W., author
The Iowa State University Press, 1964
Buku Teks
Taylor, John Keenan
Lewis Publishers, 1990
Buku Teks
Sharon Anderson [and others]
John Wiley & Sons, 1980
Buku Teks
Canavos, George C., author
Little, Brown, 1984
Buku Teks