Payne, P.A. (Peter A.), author
Peter Peregrinus, 1989
Buku Teks
edited by Galen Wood Ewing
M. Dekker, 1997
Buku Referensi
Soisson, Harold E., author
John Wiley & Sons, 1975
Buku Teks
Ramey, Robert L.
Belmont: Wadsworth, 1963
Buku Teks
Prensky, Sol D.
Buku Teks