Bachuber, Andrew H. (1964). Introduction to Logic. Quezon City, Phils.: Meredith Publishing Company.
Maboloc, Christopher Ryan B. & Pascua, Edgar II B (2012). Elements of Logic: An Integrative Approach. Quezon City, Phils.: Rex Bookstore.
McCall, Raymond J. (1952). Basic Logic: The Fundamental Principles of Formal Deductive Reasoning, 2e. New York: Barnes & Noble Books.