Cook,Franklin H.
Macmillan, 1951
Buku Teks
Kerr, Thomas S.
John Wiley & Sons, 1952
Buku Teks
by Harold F. Lusk ... [and others]
Richard D. Irwin, 1978
Buku Teks
Holmes, Ann
Cavendish Publishing Limited, 1997
Buku Teks
Howard`s
Prentice-Hall, 1967
Buku Teks