Dyfyniad APA

ebrary, Inc, World Health Organization, & World Plumbing Council. (2006). Health aspects of plumbing. World Health Organization ; World Plumbing Council.

Dyfyniad Arddull Chicago

ebrary, Inc, World Health Organization, and World Plumbing Council. Health Aspects of Plumbing. Geneva : [S.l.]: World Health Organization ; World Plumbing Council, 2006.

Dyfyniad MLA

ebrary, Inc, et al. Health Aspects of Plumbing. World Health Organization ; World Plumbing Council, 2006.

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