Rutherfoord, Andrea J., author
Prentice-Hall, 2001
Buku Teks
Weisman, Herman M.
Charles E. Merrill Publishing Company, 1980
Buku Teks
John Wiley & Sons, 1999
Buku Teks
Roze, Maris, author
Prentice-Hall, 2002
Buku Teks
Eisenberg, Anne, author
McGraw-Hill, 1992
Buku Teks