Dyfyniad APA

Willsmore, A. (1950). Product development and design. Sir Isaac pitman.

Dyfyniad Arddull Chicago

Willsmore, A.W. Product Development and Design. London: Sir Isaac pitman, 1950.

Dyfyniad MLA

Willsmore, A.W. Product Development and Design. Sir Isaac pitman, 1950.

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