Cita APA

McKnight, T. L. 1., & Lindgren, P. C. (1993). Physical geography: A landscape appreciation (4. edition --.). Englewood Cliffs, N.J.: Prentice Hall.

Citación estilo Chicago

McKnight, Thomas Lee 1928-, y Patricia Caldwell Lindgren. Physical Geography: A Landscape Appreciation. 4. edition --. Englewood Cliffs, N.J.: Prentice Hall, 1993.

Cita MLA

McKnight, Thomas Lee 1928-, y Patricia Caldwell Lindgren. Physical Geography: A Landscape Appreciation. 4. edition --. Englewood Cliffs, N.J.: Prentice Hall, 1993.