Dyfyniad APA
Harrison, P. (1992). The third revolution: Environment, population, and a sustainable world. Penguin books.
Dyfyniad Arddull Chicago
Harrison, Paul. The Third Revolution: Environment, Population, and a Sustainable World. London: Penguin books, 1992.
Dyfyniad MLA
Harrison, Paul. The Third Revolution: Environment, Population, and a Sustainable World. Penguin books, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.