Cita APA (7a ed.)

Wright, H. E., & Porter, S. C. (1979). Late-Quaternary Environments of the United States: The Late Pleistocene. University of Minnesota Press.

Cita Chicago Style (17a ed.)

Wright, H. E., y Stephen C. Porter. Late-Quaternary Environments of the United States: The Late Pleistocene. Minneapolis: University of Minnesota Press, 1979.

Cita MLA (8a ed.)

Wright, H. E., y Stephen C. Porter. Late-Quaternary Environments of the United States: The Late Pleistocene. University of Minnesota Press, 1979.