APA (7th ed.) Citation

Geyl, P., Toynbee, A., & Sorokin, P. (1949). The pattern of the past: Can we determine it? Beacon Press.

Chicago Style (17th ed.) Citation

Geyl, Pieter, Arnold Toynbee, and Pitirim Sorokin. The Pattern of the Past: Can We Determine It? Boston: Beacon Press, 1949.

MLA (9th ed.) Citation

Geyl, Pieter, et al. The Pattern of the Past: Can We Determine It? Beacon Press, 1949.