Johnson, G. E. (1916). Education through recreation. McGrath and National Recreation and Park Association.
芝加哥风格引文Johnson, George Ellsworth. Education Through Recreation. Washington: McGrath and National Recreation and Park Association, 1916.
MLA引文Johnson, George Ellsworth. Education Through Recreation. McGrath and National Recreation and Park Association, 1916.
警告：这些引文格式不一定是100％准确.