APA
Artigas M., . (1999). The Ethical Nature of Karl Popper's Theory of Knowledge. : Peter Lang Group Ag, International Academic Publishers.
Chicago
Artigas Mariano, . 1999. The Ethical Nature of Karl Popper's Theory of Knowledge. : Peter Lang Group Ag, International Academic Publishers.
Harvard
Artigas M., . (1999). The Ethical Nature of Karl Popper's Theory of Knowledge. : Peter Lang Group Ag, International Academic Publishers.
MLA
Artigas Mariano, . The Ethical Nature of Karl Popper's Theory of Knowledge. : Peter Lang Group Ag, International Academic Publishers. 1999.