Hopkins, Diana, author
Cambridge University Press, 2011
Buku Teks
Leal, A. R.
Longman, 1979
Buku Teks
Cullen, Pauline, author
Cambridge university press, 2010
Buku Teks
edited by Marguerite C. Holmes [and others]
Medical Examination, 1973
Buku Teks
Corey, Melinda, author
Simon and Shuster, 1993
Buku Teks