APA
(19451991). Open society and its enemies; Vol-I # Open society and its enemies Vol-I. London: Routledge & Kegan Paul # Routledge.
Chicago
19451991. Open society and its enemies; Vol-I # Open society and its enemies Vol-I. London: Routledge & Kegan Paul # Routledge.
Harvard
(19451991). Open society and its enemies; Vol-I # Open society and its enemies Vol-I. London: Routledge & Kegan Paul # Routledge.
MLA
Open society and its enemies; Vol-I # Open society and its enemies Vol-I. London: Routledge & Kegan Paul # Routledge. 19451991.