MacNair, Harley Farnsworth
D.van Nostrand Company,Inc., 1950
Buku Teks
Blalock, Hubert M., author
Prentice-Hall, 1982
Buku Teks
Yarwood, A.T., author
Methuen, 1982
Buku Teks
Parrillo, Vincent N., author
Pearson, 2014
Buku Teks
Berry, Brewton, author
Houghton-Miffiln, 1958
Buku Teks