Johannesson, I. (1967). Effects of praise and blame: Results of the class teacher's incentives upon achievement and attitudes of school-children. Almqvist & Wiksell.
Παραπομπή σε μορφή Chicago (17η εκδ.)Johannesson, Ingvar. Effects of Praise and Blame: Results of the Class Teacher's Incentives upon Achievement and Attitudes of School-children. Stockholm: Almqvist & Wiksell, 1967.
Παραπομπή σε μορφή MLA (8th εκδ.)Johannesson, Ingvar. Effects of Praise and Blame: Results of the Class Teacher's Incentives upon Achievement and Attitudes of School-children. Almqvist & Wiksell, 1967.
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