Gaya APA

Berk, H. (1997). Proceedings of the XI World Forestry Congress: The Economic Contribution of Forestry to Sustainable Development . Ankara: World Forestry Congress.

Gaya MLA

Berk, Hayri. "Proceedings of the XI World Forestry Congress: The Economic Contribution of Forestry to Sustainable Development". Ankara: World Forestry Congress, 1997. Proceeding.