APA
(2009). Giant codewords over 500 puzzles blue. London: Arcturus Publishing Ltd.
Chicago
2009. Giant codewords over 500 puzzles blue. London: Arcturus Publishing Ltd.
Harvard
(2009). Giant codewords over 500 puzzles blue. London: Arcturus Publishing Ltd.
MLA
Giant codewords over 500 puzzles blue. London: Arcturus Publishing Ltd. 2009.