Organisation for Economic Co-operation and Development & Seminar on Environmental Benefits from Agriculture. (1997). Environmental benefits from agriculture: Issues and policies : the Helsinki Seminar. Organisation for Economic Co-operation and Development ; OECD Washington Center [distributor].
Չիկագոյի ոճի (17րդ խմբ.) մեջբերումOrganisation for Economic Co-operation and Development and Seminar on Environmental Benefits from Agriculture. Environmental Benefits from Agriculture: Issues and Policies : The Helsinki Seminar. Paris : Washington D. C.: Organisation for Economic Co-operation and Development ; OECD Washington Center [distributor], 1997.
MLA (8րդ խմբ.) ՄեջբերումOrganisation for Economic Co-operation and Development and Seminar on Environmental Benefits from Agriculture. Environmental Benefits from Agriculture: Issues and Policies : The Helsinki Seminar. Organisation for Economic Co-operation and Development ; OECD Washington Center [distributor], 1997.