APA引文
Santayana, G., & Holzberger, W. G. (2004). The letters of George Santayana (Santayana ed.). MIT Press.
Chicago Style (17th ed.) Citation
Santayana, George, and William G. Holzberger. The Letters of George Santayana. Santayana ed. Cambridge, Mass.: MIT Press, 2004.
MLA引文
Santayana, George, and William G. Holzberger. The Letters of George Santayana. Santayana ed. MIT Press, 2004.
警告：這些引文格式不一定是100％准確.