Cita APA (7a ed.)

Brown, D. L., & Swanson, L. E. (2015). Challenges for Rural America in the Twenty-First Century. Penn State University Press.

Cita Chicago Style (17a ed.)

Brown, David L., y Louis E. Swanson. Challenges for Rural America in the Twenty-First Century. University Park: Penn State University Press, 2015.

Cita MLA (8a ed.)

Brown, David L., y Louis E. Swanson. Challenges for Rural America in the Twenty-First Century. Penn State University Press, 2015.