Παραπομπή APA

U. S. invitational conference on. (1967). Proceeding. Educational Testing Service.

Παραπομπή Chicago Style

U. S. invitational conference on. Proceeding. New Jersy: Educational Testing Service, 1967.

Παραπομπή MLA

U. S. invitational conference on. Proceeding. Educational Testing Service, 1967.