Cita APA (7a ed.)

McCormick, J. (1987). George Santayana: A biography. Alfred A. Knopf.

Cita Chicago Style (17a ed.)

McCormick, John. George Santayana: A Biography. New York: Alfred A. Knopf, 1987.

Cita MLA (9a ed.)

McCormick, John. George Santayana: A Biography. Alfred A. Knopf, 1987.