(1940). Nature recreation: Group guidance for the out-of-doors / by William ("Cap'n Bill") Gould Vinal.
芝加哥风格引文Nature Recreation: Group Guidance for the Out-of-doors / by William ("Cap'n Bill") Gould Vinal. 1940.
MLA引文Nature Recreation: Group Guidance for the Out-of-doors / by William ("Cap'n Bill") Gould Vinal. 1940.
警告：这些引文格式不一定是100％准确.