Dyfyniad APA

Gould, S. J. (2002). I have landed: Splashes and reflections in natural history. Vintage.

Dyfyniad Arddull Chicago

Gould, Stephen Jay. I Have Landed: Splashes and Reflections in Natural History. London: Vintage, 2002.

Dyfyniad MLA

Gould, Stephen Jay. I Have Landed: Splashes and Reflections in Natural History. Vintage, 2002.

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