Beling, Oscar
Prentice-Hall, 1955
Buku Teks
Boileau, Wallis, author
Irwin , 1958
Buku Teks
Knuti, Leo Leonard, 1903-, author
Prentice-Hall, 1962
Buku Teks
Milner, Oscar I.
Lewis , 1991
Buku Teks
Weaver, Barbara N., author
John Wiley & Sons, 1974
Buku Teks