Dyfyniad APA

Janzen, D. H. (1999). Survival of the wild areas of Costa Rica through its garden.

Dyfyniad Arddull Chicago

Janzen, Daniel H. Survival of the Wild Areas of Costa Rica Through Its Garden. 1999.

Dyfyniad MLA

Janzen, Daniel H. Survival of the Wild Areas of Costa Rica Through Its Garden. 1999.

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