APA (7th ed.) Citation

Upfield, A. W. (1954). The mountains have a secret. Pan Books.

Chicago Style (17th ed.) Citation

Upfield, Arthur W. The Mountains Have a Secret. London: Pan Books, 1954.

MLA (9th ed.) Citation

Upfield, Arthur W. The Mountains Have a Secret. Pan Books, 1954.

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