Dyfyniad APA

Thomann, R. V. (1972). Sytems analysis and water quality management. Mc Graw Hill Book company.

Dyfyniad Arddull Chicago

Thomann, R V. Sytems Analysis and Water Quality Management. NewYork: Mc Graw Hill Book company, 1972.

Dyfyniad MLA

Thomann, R V. Sytems Analysis and Water Quality Management. Mc Graw Hill Book company, 1972.

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