Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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