Petti, Ken; Amodeo, John; Westwood, Cassandra. (2004). Zenda : the crystal planet / created by Ken Petti and John Amodeo ; written with Cassandra Westwood. New York :: Grosset & Dunlap,.
Petti, Ken; Amodeo, John; Westwood, Cassandra. Zenda : the crystal planet / created by Ken Petti and John Amodeo ; written with Cassandra Westwood. New York :: Grosset & Dunlap,, 2004
Petti, Ken; Amodeo, John; Westwood, Cassandra. Zenda : the crystal planet / created by Ken Petti and John Amodeo ; written with Cassandra Westwood. New York :: Grosset & Dunlap,, 2004.