Parkes, Henry Bamford
Alfred A. Knoft, 1968.
Buku Teks
Hazlitt, Henry
Whittlesey House, 1942
Buku Teks
Newman, Donald J.
Little, Brown & Co., 1966
Buku Teks
Sheafor, Bradford W., author
Allyn and Bacon, c2000
Buku Teks
Skolnick, Jerome H., author
John Wiley & Sons, 1966
Buku Teks