Dyfyniad APA

Putnam, D. (1901). A text-book of psychology for secondary schools. American Book Co..

Dyfyniad Arddull Chicago

Putnam, Daniel. A Text-book of Psychology for Secondary Schools. New York : Cincinnati [etc.]: American Book Co., 1901.

Dyfyniad MLA

Putnam, Daniel. A Text-book of Psychology for Secondary Schools. American Book Co., 1901.

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