Cita APA (7a ed.)

Hornborg, A., & Crumley, C. L. (2007). The world system and the Earth system: Global socioenvironmental change and sustainability since the Neolithic. Left Coast Press, Inc.

Cita Chicago Style (17a ed.)

Hornborg, Alf, y Carole L. Crumley. The World System and the Earth System: Global Socioenvironmental Change and Sustainability Since the Neolithic. Walnut Creek, CA: Left Coast Press, Inc, 2007.

Cita MLA (9a ed.)

Hornborg, Alf, y Carole L. Crumley. The World System and the Earth System: Global Socioenvironmental Change and Sustainability Since the Neolithic. Left Coast Press, Inc, 2007.