APA Style
Gardner, Martin. (1972).
Codes, ciphers and secret writing (--).
New York:
Dover Publications.
Chicago Style
Gardner, Martin.
Codes, ciphers and secret writing.
--
New York:
Dover Publications,
1972.
Text.
MLA Style
Gardner, Martin.
Codes, ciphers and secret writing.
--
New York:
Dover Publications,
1972.
Text.
Turabian Style
Gardner, Martin.
Codes, ciphers and secret writing.
--
New York:
Dover Publications,
1972.
Print.