Rebo International, 2005
Buku Teks
Patton, Kevin T.
Elsevier, 2010
Buku Referensi
McCalll, Richard P., author
Johns Hopkins University Press, 2010
Buku Teks
McCall, Richard P, author
Johns Hopkins University Press, 2010
Buku Teks
Vigué-Martín, author
Chartwell Books, 2013
Buku Referensi