APA (7th ed.) Citation

Bunyan, J., & Whitfield, R. (2010). The pilgrim's progress. Blackstone Audiobooks.

Chicago Style (17th ed.) Citation

Bunyan, John, and Robert Whitfield. The Pilgrim's Progress. [Ashland, Or.]: Blackstone Audiobooks, 2010.

MLA (8th ed.) Citation

Bunyan, John, and Robert Whitfield. The Pilgrim's Progress. Blackstone Audiobooks, 2010.

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