Frothingham, H. L., & Rowland, M. S. (1970). Mission for Serbia: Letters from America and Canada, 1915-1920. Walker.
芝加哥风格引文Frothingham, Helen Losanitch, 与 Matilda Spence Rowland. Mission for Serbia: Letters from America and Canada, 1915-1920. New York: Walker, 1970.
MLA引文Frothingham, Helen Losanitch, 与 Matilda Spence Rowland. Mission for Serbia: Letters from America and Canada, 1915-1920. Walker, 1970.
警告：这些引文格式不一定是100％准确.