Dyfyniad APA

Drucker, P. F. (1985). Innovation and entrepreneurship: Practice and principles. Harper & Row.

Dyfyniad Arddull Chicago

Drucker, Peter Ferdinand. Innovation and Entrepreneurship: Practice and Principles. New York: Harper & Row, 1985.

Dyfyniad MLA

Drucker, Peter Ferdinand. Innovation and Entrepreneurship: Practice and Principles. Harper & Row, 1985.

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