Dyfyniad APA

Henry Baldwin Ward, G. C. W. Fresh water biology. John Wiley and Sons.

Dyfyniad Arddull Chicago

Henry Baldwin Ward, George Chandler Whipple. Fresh Water Biology. John Wiley and Sons.

Dyfyniad MLA

Henry Baldwin Ward, George Chandler Whipple. Fresh Water Biology. John Wiley and Sons.

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