Dyfyniad APA

The Planetary Garden and Other Writings. University of Pennsylvania Press.

Dyfyniad Arddull Chicago

The Planetary Garden and Other Writings. University of Pennsylvania Press.

Dyfyniad MLA

The Planetary Garden and Other Writings. University of Pennsylvania Press.

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