Παραπομπή APA

(1997). Natural resources development: Focus: tropical. Gernamy: The institute for Scientific Co-operation.

Παραπομπή Chicago Style

Natural Resources Development: Focus: Tropical. Gernamy: The institute for Scientific Co-operation, 1997.

Παραπομπή MLA

Natural Resources Development: Focus: Tropical. Gernamy: The institute for Scientific Co-operation, 1997.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.