Παραπομπή σε μορφή APA (7η εκδ.)

Petrescu, N. (1921). Thoughts on war and peace: An inquiry into the conceptions prevailing in foreign politics. Watts & Co..

Παραπομπή σε μορφή Chicago (17η εκδ.)

Petrescu, Nicholas. Thoughts on War and Peace: An Inquiry into the Conceptions Prevailing in Foreign Politics. London: Watts & Co., 1921.

Παραπομπή σε μορφή MLA (8th εκδ.)

Petrescu, Nicholas. Thoughts on War and Peace: An Inquiry into the Conceptions Prevailing in Foreign Politics. Watts & Co., 1921.