Gutkind, E. A., & Gutkind, G. (1972). Urban development in East-Central Europe: Bulgaria, Romania, and the U.S.S.R. Free Press.
芝加哥风格引文Gutkind, Erwin Anton, 与 Gabriele Gutkind. Urban Development in East-Central Europe: Bulgaria, Romania, and the U.S.S.R. New York: Free Press, 1972.
MLA引文Gutkind, Erwin Anton, 与 Gabriele Gutkind. Urban Development in East-Central Europe: Bulgaria, Romania, and the U.S.S.R. Free Press, 1972.
警告：这些引文格式不一定是100％准确.