Buku Teks
Adler, Mortimer Jerome, 1902-2001, author
Macmillan, 1979
Buku Teks
edited by George P. Stein, Agnes Stein
Prentice-Hall, 1973
Buku Teks
Palmer, E.H.B., author
W. Foulsham, [1955]
Buku Referensi
Dy, Victor L., author
Elex Media Komputindo, 1997
Buku Teks