Anderson and Arsenault defines six types of knowledge: Historical knowledge, axiological knowledge, theoretical and conceptual knowledge, prior research studies, reviews and academic debate. Axiological knowledge, also be called a “theory of experience”, is created by practitioners who share their long-term experiences. Axiological knowledge may include important conclusions and generalizations. This kind of literature knowledge does not mean technicalities but the world of practice. So, the literature reviewer should notice the potential use of the axiological knowledge and avoid using it as a theory or prior research.