APA (7th ed.) Citation

Keene, C. (1930). Nancy Drew Mystery Stories: The Hidden Staircase No. 2. Grosset & Dunlap.

Chicago Style (17th ed.) Citation

Keene, Carolyn. Nancy Drew Mystery Stories: The Hidden Staircase No. 2. New York: Grosset & Dunlap, 1930.

MLA (9th ed.) Citation

Keene, Carolyn. Nancy Drew Mystery Stories: The Hidden Staircase No. 2. Grosset & Dunlap, 1930.

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