Dyfyniad APA

PERI. (2008). Handbook 2008: Formwork scaffolding engineering. PERI.

Dyfyniad Arddull Chicago

PERI. Handbook 2008: Formwork Scaffolding Engineering. Weissenhorn, Germany: PERI, 2008.

Dyfyniad MLA

PERI. Handbook 2008: Formwork Scaffolding Engineering. PERI, 2008.

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