APA (7th ed.) Citation

Keene, C. (1990). Nancy Drew: The flying saucer mystery. A Minstrel Book.

Chicago Style (17th ed.) Citation

Keene, Carolyn. Nancy Drew: The Flying Saucer Mystery. New York: A Minstrel Book, 1990.

MLA (9th ed.) Citation

Keene, Carolyn. Nancy Drew: The Flying Saucer Mystery. A Minstrel Book, 1990.