APA Style

Santayana, G., Holzberger, W, G. (2001.). The letters of George Santayana. (Santayana ed.). Cambridge, Mass. ;: MIT Press,.

MLA Style

Santayana, George,., Holzberger, William, G.. "The letters of George Santayana.". Santayana ed. Cambridge, Mass. ;: MIT Press,, 2001.. .