The Tunguska Mystery

MLA

Rubtsov, Vladimir, and Edward Ashpole. The Tunguska Mystery. Springer New York, 2009.

APA

Rubtsov, V., & Ashpole, E. (2009). The Tunguska Mystery. Springer New York.

Chicago

Rubtsov, Vladimir, and Edward Ashpole. The Tunguska Mystery. : Springer New York, 2009.