Porche, Demetrius James, author
Jones and Bartlett Learning, 2012
Buku Teks
Champman, Christine M., author
Bailliere Tindall, 1982
Buku Teks
Barry, Anne-Marie, author
SAGE Publications Ltd, 2016
Buku Teks
Williams, Anne, author
Butterworth-Heinemann , 1998
Buku Teks
edited by Jeannette R. Folta
John Wiley & Sons, 1979
Buku Teks