APA Edition Citation

Karl Popper. (2013). Two Fundamental Problems of the Theory of Knowledge. Routledge.

Chicago Edition Citation

Karl Popper. Two Fundamental Problems of the Theory of Knowledge. Routledge, 2013.

MLA Edition Citation

Karl Popper. Two Fundamental Problems of the Theory of Knowledge. Routledge, 2013.

Warning: These citations may not always be 100% accurate.