APA Style

Singer, Marilyn. (1985). A Clue in Code . New York :: Harper Trophy.

Chicago Style

Singer, Marilyn. A Clue in Code. New York :: Harper Trophy, 1985. Text.

MLA Style

Singer, Marilyn. A Clue in Code. New York :: Harper Trophy, 1985. Text.

Turabian Style

Singer, Marilyn. A Clue in Code. New York :: Harper Trophy, 1985. Print.