Dyfyniad APA

Piaget,Jean. (1970). Main trends in interdisciplinary research. George Allen & Unwin.

Dyfyniad Arddull Chicago

Piaget,Jean. Main Trends in Interdisciplinary Research. Great Britain: George Allen & Unwin, 1970.

Dyfyniad MLA

Piaget,Jean. Main Trends in Interdisciplinary Research. George Allen & Unwin, 1970.

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