APA
Macquarrie J., . (1987). Existentialism. London: Penguin Books.
Chicago
Macquarrie John, . 1987. Existentialism. London: Penguin Books.
Harvard
Macquarrie J., . (1987). Existentialism. London: Penguin Books.
MLA
Macquarrie John, . Existentialism. London: Penguin Books. 1987.
