APA
(1967). ENCYCLOPARDIA OF PHILOSOPHY. NEW YORK: MACMILLAN COMPANY AND THE FREE PRESS.
Chicago
1967. ENCYCLOPARDIA OF PHILOSOPHY. NEW YORK: MACMILLAN COMPANY AND THE FREE PRESS.
Harvard
(1967). ENCYCLOPARDIA OF PHILOSOPHY. NEW YORK: MACMILLAN COMPANY AND THE FREE PRESS.
MLA
ENCYCLOPARDIA OF PHILOSOPHY. NEW YORK: MACMILLAN COMPANY AND THE FREE PRESS. 1967.