Παραπομπή APA

(1967). Index of selected outdoor recreation literature. Washington, D.C.: Department of the Interior.

Παραπομπή Chicago Style

Index of Selected Outdoor Recreation Literature. Washington, D.C.: Department of the Interior, 1967.

Παραπομπή MLA

Index of Selected Outdoor Recreation Literature. Washington, D.C.: Department of the Interior, 1967.

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