Παραπομπή APA

Olsson, G. (1965). Distance and human interaction: A review and bibliography. Philadelphia: Regional Science Research Institute.

Παραπομπή Chicago Style

Olsson, Gunnar. Distance and Human Interaction: A Review and Bibliography. Philadelphia: Regional Science Research Institute, 1965.

Παραπομπή MLA

Olsson, Gunnar. Distance and Human Interaction: A Review and Bibliography. Philadelphia: Regional Science Research Institute, 1965.

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