Dyfyniad APA

(1978). Sanitation in developing countries. John wiley & Sons.

Dyfyniad Arddull Chicago

Sanitation in Developing Countries. New York: John wiley & Sons, 1978.

Dyfyniad MLA

Sanitation in Developing Countries. John wiley & Sons, 1978.

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