APA Style
Santayana, G., Holzberger, W, G.
(2004.).
The letters of George Santayana.
.
Cambridge, Mass. ;:
MIT,.
MLA Style
Santayana, George,., Holzberger, William, G..
"The letters of George Santayana.".
Cambridge, Mass. ;:
MIT,,
2004..
.