APA-ийн эшлэл(7 дахь хэвлэлт)

(1940). Nature recreation: Group guidance for the out-of-doors / by William ("Cap'n Bill") Gould Vinal.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Nature Recreation: Group Guidance for the Out-of-doors / by William ("Cap'n Bill") Gould Vinal. 1940.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Nature Recreation: Group Guidance for the Out-of-doors / by William ("Cap'n Bill") Gould Vinal. 1940.