Παραπομπή σε μορφή APA (7η εκδ.)

Ionescu, G., & Madariaga, I. d. (1972). Opposition: Past and present of a political institution. Penguin Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ionescu, Ghița, και Isabel de Madariaga. Opposition: Past and Present of a Political Institution. London: Penguin Books, 1972.

Παραπομπή σε μορφή MLA (8th εκδ.)

Ionescu, Ghița, και Isabel de Madariaga. Opposition: Past and Present of a Political Institution. Penguin Books, 1972.