Wolff Douglas, D. (1925). Guillaume De Greef: The social theory of an early syndicalist. New York: Columbia University.
芝加哥风格引文Wolff Douglas, Dorothy. Guillaume De Greef: The Social Theory of an Early Syndicalist. New York: Columbia University, 1925.
MLA引文Wolff Douglas, Dorothy. Guillaume De Greef: The Social Theory of an Early Syndicalist. New York: Columbia University, 1925.
警告：这些引文格式不一定是100％准确.