Cita APA (7a ed.)

Turchin, P., & Nefedov, S. A. (2009). Secular cycles. Princeton University Press.

Cita Chicago Style (17a ed.)

Turchin, Peter, y S. A. Nefedov. Secular Cycles. Princeton, N.J. ; Woodstock: Princeton University Press, 2009.

Cita MLA (9a ed.)

Turchin, Peter, y S. A. Nefedov. Secular Cycles. Princeton University Press, 2009.