APA (7th ed.) Citation

Gehlen, K. v. (1985). The environmental impacts of exploitation of oil shales and tar sands. United Naions Environment Programme.

Chicago Style (17th ed.) Citation

Gehlen, K. von. The Environmental Impacts of Exploitation of Oil Shales and Tar Sands. Nairobi: United Naions Environment Programme, 1985.

MLA (9th ed.) Citation

Gehlen, K. von. The Environmental Impacts of Exploitation of Oil Shales and Tar Sands. United Naions Environment Programme, 1985.

Warning: These citations may not always be 100% accurate.