APA (7th ed.) Citation

Gardner, E. S. (1963). The case of the stepdaughter's secret. Morrow.

Chicago Style (17th ed.) Citation

Gardner, Erle Stanley. The Case of the Stepdaughter's Secret. New York: Morrow, 1963.

MLA (9th ed.) Citation

Gardner, Erle Stanley. The Case of the Stepdaughter's Secret. Morrow, 1963.

Warning: These citations may not always be 100% accurate.