CECCO JOHN P; CRAWFORD WILLIAM. (1988). PSYCHOLOGY OF LEARNING AND INSTRUCTION: EDUCATIONAL PSYCHOLOGY (2.). PRENTICE -HALL INTERNATIONAL, INC.
Lua i Stíl Chicago (17ú heag.)CECCO JOHN P; CRAWFORD WILLIAM. PSYCHOLOGY OF LEARNING AND INSTRUCTION: EDUCATIONAL PSYCHOLOGY. 2. NEW DLEHI: PRENTICE -HALL INTERNATIONAL, INC, 1988.
Lua MLA (9ú heag.)CECCO JOHN P; CRAWFORD WILLIAM. PSYCHOLOGY OF LEARNING AND INSTRUCTION: EDUCATIONAL PSYCHOLOGY. 2. PRENTICE -HALL INTERNATIONAL, INC, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.