Dyfyniad APA

David de la Croix. (2013). Fertility ,Education,Growth and Sustainability. Cambridge University.

Dyfyniad Arddull Chicago

David de la Croix. Fertility ,Education,Growth and Sustainability. Newyork: Cambridge University, 2013.

Dyfyniad MLA

David de la Croix. Fertility ,Education,Growth and Sustainability. Cambridge University, 2013.

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