Dyfyniad APA

WEILL ANN. (2019). THE WORLD'S MOST AMAZING NATIONAL PARKS (2018 Ed.). RAINTREE PUBLISHERS.

Dyfyniad Arddull Chicago

WEILL ANN. THE WORLD'S MOST AMAZING NATIONAL PARKS. 2018 Ed. CHICAGO: RAINTREE PUBLISHERS, 2019.

Dyfyniad MLA

WEILL ANN. THE WORLD'S MOST AMAZING NATIONAL PARKS. 2018 Ed. RAINTREE PUBLISHERS, 2019.

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