Dyfyniad APA

International Labour Office & Heap, A. (1987). Improving site productivity in the construction industry. International Labour Office.

Dyfyniad Arddull Chicago

International Labour Office and Alan Heap. Improving Site Productivity in the Construction Industry. Geneva: International Labour Office, 1987.

Dyfyniad MLA

International Labour Office and Alan Heap. Improving Site Productivity in the Construction Industry. International Labour Office, 1987.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.