Παραπομπή APA

Heilbroner, R. L. (1980). Marxism; For and Against. W.W. Norton.

Παραπομπή Chicago Style

Heilbroner, Robert L. Marxism; For and Against. New YOrk: W.W. Norton, 1980.

Παραπομπή MLA

Heilbroner, Robert L. Marxism; For and Against. W.W. Norton, 1980.