After World War II Šumenković, moved to Great Britain. In 1960, together with young Stevan K. Pavlowitch, he co-authored the book on Vojislav Marinković. Next year his book Naša emigracija i spoljna politika ("Our Emigration and Foreign Policy") was published in Canada.http://www.worldcat.org/title/nasa-emigracija-i-spoljna-politika/oclc/185036531
