Midgley, Barry, editor
Chartwell Books, 1982.
Buku Referensi
Bowers, Helen, author
Firefly Books, 2004
Buku Teks
Malpas, William, author
Crescent Moon, 2016
Buku Teks
Edited by Angela Gair
Chronicle Books, 1996
Buku Referensi
Ziegler, Kathleen, author
Rockport Publishers, 1994
Buku Referensi