Levy, John M., author
Prentice-Hall, 1991
Buku Referensi
Lang, Jon, author
Van Nostrand Reinhold, 1994
Buku Referensi
Jones, Emrys, author
Oxford University Press, 1970
Buku Teks
edited by Clare Cooper Marcus and Carolyn Francis ; drawings by Su Sin Tang and Yun Flora Yeh
John Wiley & Sons, 1998
Buku Teks
McGraw-Hill, 1976
Buku Teks