Bengtsson, A. (1972). Adventure playgrounds. Crosby Lockwood Staples.
芝加哥风格引文Bengtsson, Arvid. Adventure Playgrounds. London: Crosby Lockwood Staples, 1972.
MLA引文Bengtsson, Arvid. Adventure Playgrounds. Crosby Lockwood Staples, 1972.
警告：这些引文格式不一定是100％准确.