Dyfyniad APA

Smith, T. M. (2015). Elements of ecology. Harlow, Essex: Pearson Education.

Dyfyniad Arddull Chicago

Smith, Thomas M. Elements of Ecology. Harlow, Essex: Pearson Education, 2015.

Dyfyniad MLA

Smith, Thomas M. Elements of Ecology. Harlow, Essex: Pearson Education, 2015.

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