Παραπομπή σε μορφή APA (7η εκδ.)

Higgins, R. (2009). Themes and theories: Selected essays, speeches, and writings in international law. Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Higgins, Rosalyn. Themes and Theories: Selected Essays, Speeches, and Writings in International Law. Oxford ; New York: Oxford University Press, 2009.

Παραπομπή σε μορφή MLA (8th εκδ.)

Higgins, Rosalyn. Themes and Theories: Selected Essays, Speeches, and Writings in International Law. Oxford University Press, 2009.