Billings, W., & Nathan, H. (1961). The continental harmony. Harvard University Press.
芝加哥风格引文Billings, William, 与 Hans Nathan. The Continental Harmony. Cambridge, Massachusetts: Harvard University Press, 1961.
MLA引文Billings, William, 与 Hans Nathan. The Continental Harmony. Harvard University Press, 1961.
警告：这些引文格式不一定是100％准确.