Gästrin, J. (1940). Det intelligenta lärandets problem.
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Chicago Style (17th ed.) Citation
Gästrin, Jan. Det Intelligenta Lärandets Problem. Åbo, 1940.
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MLA引文
Gästrin, Jan. Det Intelligenta Lärandets Problem. 1940.
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警告：這些引文格式不一定是100％准確.