Cita APA (7a ed.)

Cairns, G., & Sorokin, P. A. (1963). Philosophies of history. Peter Owen Limited.

Cita Chicago Style (17a ed.)

Cairns, Grace, y Pitirim A. Sorokin. Philosophies of History. London: Peter Owen Limited, 1963.

Cita MLA (9a ed.)

Cairns, Grace, y Pitirim A. Sorokin. Philosophies of History. Peter Owen Limited, 1963.