Helsinki rules on the uses of the waters of international rivers.

MLA

Conference 20.08.1966 Helsinki. Helsinki Rules On the Uses of the Waters of International Rivers. London, 1967.

APA

Conference 20.08.1966 Helsinki, C. 20.08.1966 Helsinki. (1967). Helsinki rules on the uses of the waters of international rivers. London.

Chicago

Conference 20.08.1966 Helsinki Helsinki Rules On the Uses of the Waters of International Rivers. London, 1967.