Metcalf, Michael
Oxford University Press , 1990
Buku Teks
Kreitzberg, Charles B.
Harcourt Brace Javanovich, 1982
Buku Teks
McCalla, Thomas Richard
John Wiley & Sons, 1967
Buku Teks
Maratek, Samuel L.
Academic Press, 1983
Buku Teks
Nanney, T. Ray
Prentice-Hall, 1981
Buku Teks