Παραπομπή APA

Hartshorne, R. (1961). The nature of geography: A critical survey of current thought in the light of the past. Lancaster, PA: The Association of American Geographers.

Παραπομπή Chicago Style

Hartshorne, Richard. The Nature of Geography: A Critical Survey of Current Thought in the Light of the Past. Lancaster, PA: The Association of American Geographers, 1961.

Παραπομπή MLA

Hartshorne, Richard. The Nature of Geography: A Critical Survey of Current Thought in the Light of the Past. Lancaster, PA: The Association of American Geographers, 1961.

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