APA (7th ed.) Citation

Ringwald, W. (2015). The secret cipher /2. Katherine Tegen Books, an imprint of HarperCollins Publishers.

Chicago Style (17th ed.) Citation

Ringwald, Whitaker. The Secret Cipher /2. New York, NY: Katherine Tegen Books, an imprint of HarperCollins Publishers, 2015.

MLA (8th ed.) Citation

Ringwald, Whitaker. The Secret Cipher /2. Katherine Tegen Books, an imprint of HarperCollins Publishers, 2015.

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