Dyfyniad APA

Alley, E. R. (2000). Water quality control hand book. Mc Graw- Hill.

Dyfyniad Arddull Chicago

Alley, E. Roberts. Water Quality Control Hand Book. New York: Mc Graw- Hill, 2000.

Dyfyniad MLA

Alley, E. Roberts. Water Quality Control Hand Book. Mc Graw- Hill, 2000.

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