APA (7th ed.) Citation

Lewis, C. S., & Hooper, W. (2004). The collected letters of C.S. Lewis. HarperSanFrancisco.

Chicago Style (17th ed.) Citation

Lewis, C. S., and Walter Hooper. The Collected Letters of C.S. Lewis. [San Francisco]: HarperSanFrancisco, 2004.

MLA (9th ed.) Citation

Lewis, C. S., and Walter Hooper. The Collected Letters of C.S. Lewis. HarperSanFrancisco, 2004.

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