APA (7th ed.) Citation

Lewis, C. S. (1977). The pilgrim's regress. Collins.

Chicago Style (17th ed.) Citation

Lewis, C. S. The Pilgrim's Regress. Glasgow: Collins, 1977.

MLA (9th ed.) Citation

Lewis, C. S. The Pilgrim's Regress. Collins, 1977.

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