Christiansen, M. L. (1977). Park planning handbook: Fundamentals of physical planning for parks and recreation areas. Wiley.
Cita Chicago (17th ed.)Christiansen, Monty L. Park Planning Handbook: Fundamentals of Physical Planning for Parks and Recreation Areas. New York: Wiley, 1977.
Cita MLA (9th ed.)Christiansen, Monty L. Park Planning Handbook: Fundamentals of Physical Planning for Parks and Recreation Areas. Wiley, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.