Lindgren, Bernard W., author
Macmillan, 1968
Buku Teks
Barnett, Vic, author
John Wiley & Sons, 1982
Buku Teks
Keeping, E.S., author
Van Nostrand Reinhold, 1962
Buku Teks
Blackwell, David, author
Dover, 1954
Buku Teks
Dobson, Annette, author
Chapman and Hall, 1983
Buku Teks