Dyfyniad APA

Worldwatch Institute, Brown, L. R., & Starke, L. (1988). State of the world 1988: A Worldwatch Institute report on progress toward a sustainable society. Norton.

Dyfyniad Arddull Chicago

Worldwatch Institute, Lester R. Brown, and Linda Starke. State of the World 1988: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York : London: Norton, 1988.

Dyfyniad MLA

Worldwatch Institute, et al. State of the World 1988: A Worldwatch Institute Report on Progress Toward a Sustainable Society. Norton, 1988.

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