Cita APA (7a ed.)

Ravskii, E. I., Tseitlin, S. M., & Chard, C. S. (1968). Geological periodization of the sites of the Siberian Palaeolithic. [s.n.].

Cita Chicago Style (17a ed.)

Ravskii, E. I., S. M. Tseitlin, y Chester S. Chard. Geological Periodization of the Sites of the Siberian Palaeolithic. [S.l.]: [s.n.], 1968.

Cita MLA (9a ed.)

Ravskii, E. I., et al. Geological Periodization of the Sites of the Siberian Palaeolithic. [s.n.], 1968.