Dyfyniad APA

Lang, B. A history of the case study. Oxford University Press.

Dyfyniad Arddull Chicago

Lang, Birgit. A History of the Case Study. Oxford University Press.

Dyfyniad MLA

Lang, Birgit. A History of the Case Study. Oxford University Press.

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