Dyfyniad APA

Gareis, R. &. O. (2013). Project management and sustanable development principles. Project management institute.

Dyfyniad Arddull Chicago

Gareis, Ronald & Other. Project Management and Sustanable Development Principles. Pennsylvania: Project management institute, 2013.

Dyfyniad MLA

Gareis, Ronald & Other. Project Management and Sustanable Development Principles. Project management institute, 2013.

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