Petrescu, N. (1921). Thoughts on war and peace: An inquiry into the conceptions prevailing in foreign politics. Watts & Co..
Lua i Stíl Chicago (17ú heag.)Petrescu, Nicholas. Thoughts on War and Peace: An Inquiry into the Conceptions Prevailing in Foreign Politics. London: Watts & Co., 1921.
Lua MLA (8ú heag.)Petrescu, Nicholas. Thoughts on War and Peace: An Inquiry into the Conceptions Prevailing in Foreign Politics. Watts & Co., 1921.
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