Παραπομπή APA

Unesco. (1977). Thinking ahead: Unesco and the challenges of today and tomorow. Unesco.

Παραπομπή Chicago Style

Unesco. Thinking Ahead: Unesco and the Challenges of Today and Tomorow. Paris: Unesco, 1977.

Παραπομπή MLA

Unesco. Thinking Ahead: Unesco and the Challenges of Today and Tomorow. Unesco, 1977.