Dyfyniad APA

Walters, M. J. (2004). Seven modern plagues and how we are causing them (Paperback edition.). Island Press.

Dyfyniad Arddull Chicago

Walters, Mark Jerome. Seven Modern Plagues and How We Are Causing Them. Paperback edition. Washington, District of Columbia: Island Press, 2004.

Dyfyniad MLA

Walters, Mark Jerome. Seven Modern Plagues and How We Are Causing Them. Paperback edition. Island Press, 2004.

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