Apel, W. (1947). Masters of the keyboard: A brief survey of pianoforte music. Harvard Univ. Press.
芝加哥风格引文Apel, Willi. Masters of the Keyboard: A Brief Survey of Pianoforte Music. Cambridge: Harvard Univ. Press, 1947.
MLA引文Apel, Willi. Masters of the Keyboard: A Brief Survey of Pianoforte Music. Harvard Univ. Press, 1947.
警告：这些引文格式不一定是100％准确.