Curtis, Sarah
Edward Arnold, 1996
Buku Teks
Hardy, Margaret E.
Appleton-century-crofts , 1978
Buku Teks
edited by D.R. Rutter, and Lyn Quine
Avebury, 1994
Buku Teks
James A. Johnson, Carleen H. Stoskopf
Jones and Bartlett Publishers, 2010
Buku Teks
Malcolm Maclachlan
John Wiley & sons Ltd, 2000
Buku Teks