PFEIFFER J W. (1975). HB OF STRUCTURED EXPERIENCES FOR HUMAN REL. TRAINING VOL.V. UNIVERSITY ASSOCIATION.
Lua i Stíl Chicago (17ú heag.)PFEIFFER J W. HB OF STRUCTURED EXPERIENCES FOR HUMAN REL. TRAINING VOL.V. CALIFORNIA: UNIVERSITY ASSOCIATION, 1975.
Lua MLA (9ú heag.)PFEIFFER J W. HB OF STRUCTURED EXPERIENCES FOR HUMAN REL. TRAINING VOL.V. UNIVERSITY ASSOCIATION, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.