Dyfyniad APA
Viesssman, W., & Welty, C. (1985). Water management: Technology and institutions. Harper.
Dyfyniad Arddull Chicago
Viesssman, Warren, and Clare Welty. Water Management: Technology and Institutions. Cambrdge: Harper, 1985.
Dyfyniad MLA
Viesssman, Warren, and Clare Welty. Water Management: Technology and Institutions. Harper, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.