Sproul, R. C. (2003). Defending your Faith: An introduction to apologetics. Crossway.
Chicago-čujuhus (17. p.)Sproul, R. C. Defending Your Faith: An Introduction to Apologetics. Wheaton, IL: Crossway, 2003.
MLA-čujuhus (9. p.)Sproul, R. C. Defending Your Faith: An Introduction to Apologetics. Crossway, 2003.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.