Knudson, D. M. (1984). Outdoor recreation (Revised edition.). New York, New York: Macmillan Publishing Company.
Citación estilo ChicagoKnudson, Douglas M. Outdoor Recreation. Revised edition. New York, New York: Macmillan Publishing Company, 1984.
Cita MLAKnudson, Douglas M. Outdoor Recreation. Revised edition. New York, New York: Macmillan Publishing Company, 1984.
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