Παραπομπή APA

Chomsky, N. (1971). Problems of knowledge and freedom: The Russel lecturers. Vintage.

Παραπομπή Chicago Style

Chomsky, Noam. Problems of Knowledge and Freedom: The Russel Lecturers. New York: Vintage, 1971.

Παραπομπή MLA

Chomsky, Noam. Problems of Knowledge and Freedom: The Russel Lecturers. Vintage, 1971.