Παραπομπή APA

(1977). World of learning 1977-78 V.1: International, Afghanistan-Qatar (28.). Europa Publications Limited.

Παραπομπή Chicago Style

World of Learning 1977-78 V.1: International, Afghanistan-Qatar. 28. London: Europa Publications Limited, 1977.

Παραπομπή MLA

World of Learning 1977-78 V.1: International, Afghanistan-Qatar. 28. Europa Publications Limited, 1977.