Dyfyniad APA

Ricker, W. . E. (1971). Methods for assessment of fish production in fresh waters/2nd ed (2nd ed.). Oxford.

Dyfyniad Arddull Chicago

Ricker, W E. Methods for Assessment of Fish Production in Fresh Waters/2nd Ed. 2nd ed. Edinburgh: Oxford, 1971.

Dyfyniad MLA

Ricker, W E. Methods for Assessment of Fish Production in Fresh Waters/2nd Ed. 2nd ed. Oxford, 1971.

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