Cita APA (7a ed.)

Santayana, G. (1905). The Life of Reason or the Phases of Human Progress: Reason in Science. Constable & Company Ltd.

Cita Chicago Style (17a ed.)

Santayana, George. The Life of Reason or the Phases of Human Progress: Reason in Science. London ; Bombay ; Sydney: Constable & Company Ltd, 1905.

Cita MLA (9a ed.)

Santayana, George. The Life of Reason or the Phases of Human Progress: Reason in Science. Constable & Company Ltd, 1905.