Style de citation APA (7e éd.)

Santayana, G. (2001). The letters of George Santayana. The letters of George Santayana.

Style de citation Chicago (17e éd.)

Santayana, George. "The Letters of George Santayana." The Letters of George Santayana 2001.

Style de citation MLA (8e éd.)

Santayana, George. "The Letters of George Santayana." The Letters of George Santayana, 2001.