Rebo International, 2005
Buku Teks
Patton, Kevin T.
Elsevier, 2010
Buku Referensi
Vigué-Martín
Chartwell Books, 2013
Buku Referensi
Rohen, Johannes W.
Lippincott Williams & Wilkins, 2011
Buku Referensi
Ellis, Harold
Butterworth-Heinemann, 1994
Buku Referensi