Harold W. Baillie, John McGeehan, Thomas M. Garrett, Rosellen M. Garrett
Pearson, 2013
Buku Teks
Hall, George M.
Warren H. Green, 1992
Buku Teks
Editor: Souzy Dracopoulou
Routledge, 1998
Buku Teks
Garrett, Thomas M.
Prentice-Hall, 2001
Buku Teks
edited by Michael Parker
Routledge , 1999
Buku Teks