Tow, William T., author
Cambridge University Press, 2001
Buku Teks
Freeman, Otis W., author
John Wiley & Sons, 1951
Buku Teks
Freeman, Otis W., author
John Wiley, 1951
Buku Teks
edited Otis W. Freeman
Wiley, 1951
Buku Teks
Simon and Schuster , 1995
Buku Teks