Eriksen, A. Playground Design. New York: Van Nostrand Reinhold Company, 1985 102 p. ill. 0-442-22257-2.
Eriksen, A. Playground Design. New York: Van Nostrand Reinhold Company, 1985 102 p. ill. 0-442-22257-2.
Eriksen, A. (1985) Playground Design, New York: Van Nostrand Reinhold Company 102 p. ill. 0-442-22257-2.
Eriksen, A. (1985). Playground Design. Outdoor Environments for Learning and Development. New York: Van Nostrand Reinhold Company, 102 p. ill.
Eriksen A. Playground Design: Outdoor Environments for Learning and Development. New York: Van Nostrand Reinhold Company; 1985. p. 102 p. ill. ISBN: 0-442-22257-2.