Παραπομπή APA

Heineberg, H., Lange, N. d., & Mayr, A. (1996). The Rhine Valley: Urban, harbour and industrial development and environmental problems. Leipzig: Institut for Landerkunde Leipzig.

Παραπομπή Chicago Style

Heineberg, Heinz, Norbert de Lange, and Alois Mayr. The Rhine Valley: Urban, Harbour and Industrial Development and Environmental Problems. Leipzig: Institut for Landerkunde Leipzig, 1996.

Παραπομπή MLA

Heineberg, Heinz, Norbert de Lange, and Alois Mayr. The Rhine Valley: Urban, Harbour and Industrial Development and Environmental Problems. Leipzig: Institut for Landerkunde Leipzig, 1996.

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