O.Day, Edward F.
Prentice-Hall, 1974
Buku Teks
Brown, Marie Scott
J.B. Lippincott , 1984
Buku Teks
Penderghast, Thomas F.
Harcourt Brace Jovanovich, 1988
Buku Teks
Rijanto Tosin, author
Dinastindo, 1991
Buku Referensi
Lindeman, Carol A., author
W.B. Saunders, 1999
Buku Teks