Gaya APA

Poythress, V, S. (2013). Logic : A God - Centered Approach to the Foundation of Western Thought . Wheaton, Illinois: Crossway Books.

Gaya MLA

Poythress, Vern, Sheridan. "Logic : A God - Centered Approach to the Foundation of Western Thought". Wheaton, Illinois: Crossway Books, 2013. Academic.