Robert, Julian L.
W.H. Freeman, 1991
Buku Teks
Sousa, John J.
Rhode Island Consortium, 1990
Buku Teks
Beran, J.A.
John Wiley & Sons, 2009
Buku Teks
Timberlake, Karen C.
Pearson Benjamin Cummings, 2007
Buku Teks
Conroy, Lawrence E.
Macmillan, 1972
Buku Teks