APA (7th ed.) Citation

Howard, P. (1961). Frank Buchman's secret. Heinemann.

Chicago Style (17th ed.) Citation

Howard, Peter. Frank Buchman's Secret. London: Heinemann, 1961.

MLA (9th ed.) Citation

Howard, Peter. Frank Buchman's Secret. Heinemann, 1961.

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