APA (7th ed.) Citation

Buchan, J. (1994). The thirty-nine steps / John Buchan (New ed.). Penguin.

Chicago Style (17th ed.) Citation

Buchan, John. The Thirty-nine Steps / John Buchan. New ed. Harmondsworth: Penguin, 1994.

MLA (9th ed.) Citation

Buchan, John. The Thirty-nine Steps / John Buchan. New ed. Penguin, 1994.

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