Dale, Ernest, author
McGraw-Hill, 1960
Buku Teks
Dale, Ernest, author
McGraw-Hill, 1969
Buku Teks
Carlson, Jeff, author
Peachpit Press, 2002
Buku Teks
Dale, Ernest, author
McGraw-Hill, 1960
Buku Teks
Ecklein, Joan Levin, author
John Wiley & Sons, 1972
Buku Teks