Säljö, Roger (1975) (på engelska). Qualitative differences in learning as a function of the learner's conception of the task. Göteborg studies in educational sciences, 0436-1121 ; 14Rapport / Projekt TIPS, 99-0112255-4 ; 19. Göteborg: Abacus läromedel. Libris7637048. ISBN 9173460125