Taraborrelli, J. Randy
Sidgwick & Jackson, 2009
Buku Teks
Parks, Lillian Rogers
Fleet Publishing , 1961
Buku Teks
Thompson, Douglas
John Blake, 2007
Buku Teks
Hubbard, L. Ron, 1911-1986
Bridge Publications, Inc., 2012
Buku Referensi
Fisher, Carrie
POP, 2018
Buku Teks