APA (7th ed.) Citation

Lewis, C. S., & Hooper, W. (1987). Timeless at heart: Essays on theology. Collins.

Chicago Style (17th ed.) Citation

Lewis, C. S., and Walter Hooper. Timeless at Heart: Essays on Theology. Glasgow: Collins, 1987.

MLA (9th ed.) Citation

Lewis, C. S., and Walter Hooper. Timeless at Heart: Essays on Theology. Collins, 1987.

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