APA
Popper Karl,, . (2013). Conjectures and refutations : The growth of scientific knowledge. London: Routledge.
Chicago
Popper Karl,, . 2013. Conjectures and refutations : The growth of scientific knowledge. London: Routledge.
Harvard
Popper Karl,, . (2013). Conjectures and refutations : The growth of scientific knowledge. London: Routledge.
MLA
Popper Karl,, . Conjectures and refutations : The growth of scientific knowledge. London: Routledge. 2013.