Dyfyniad APA

(1991). Contemporary International Law: A Concise Introduction / Werner Levi. Westview Press.

Dyfyniad Arddull Chicago

Contemporary International Law: A Concise Introduction / Werner Levi. Westview Press, 1991.

Dyfyniad MLA

Contemporary International Law: A Concise Introduction / Werner Levi. Westview Press, 1991.

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