Ullman, R. H. (1961). Anglo-Soviet relations, 1917-1921. Princeton University Press.
芝加哥风格引文Ullman, Richard Henry. Anglo-Soviet Relations, 1917-1921. Princeton, N. J: Princeton University Press, 1961.
MLA引文Ullman, Richard Henry. Anglo-Soviet Relations, 1917-1921. Princeton University Press, 1961.
警告：这些引文格式不一定是100％准确.