McKnight, T. L., & Hess, D. Physical geography: A landscape appreciation (6a ed.).
Cita Chicago (17th ed.)McKnight, Tom L., i Darrel Hess. Physical Geography: A Landscape Appreciation. 6a ed.
Cita MLA (8th ed.)McKnight, Tom L., i Darrel Hess. Physical Geography: A Landscape Appreciation. 6a ed.
Atenció: Aquestes cites poden no estar 100% correctes.