Dyfyniad APA

Needham, J. (1937). Integrative levels: A revaluation of the idea of progress. Oxford: The Clarendon press.

Dyfyniad Arddull Chicago

Needham, Joseph. Integrative Levels: A Revaluation of the Idea of Progress. Oxford: The Clarendon press, 1937.

Dyfyniad MLA

Needham, Joseph. Integrative Levels: A Revaluation of the Idea of Progress. Oxford: The Clarendon press, 1937.

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