APA

United States, United States, . (1999). 1997 amendment to Montreal Protocol: message from the President of the United States transmitting amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer (the "Montreal Protocol"), adopted at Montreal on September 15-17, 1997, by the ninth meeting of the parties to the Montreal Protocol. Washington: U.S. Government Printing Office.

Chicago

United States, United States, . 1999. 1997 amendment to Montreal Protocol: message from the President of the United States transmitting amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer (the "Montreal Protocol"), adopted at Montreal on September 15-17, 1997, by the ninth meeting of the parties to the Montreal Protocol. Washington: U.S. Government Printing Office.

Harvard

United States, United States, . (1999). 1997 amendment to Montreal Protocol: message from the President of the United States transmitting amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer (the "Montreal Protocol"), adopted at Montreal on September 15-17, 1997, by the ninth meeting of the parties to the Montreal Protocol. Washington: U.S. Government Printing Office.

MLA

United States, United States, . 1997 amendment to Montreal Protocol: message from the President of the United States transmitting amendment to the Montreal Protocol on Substances that Deplete the Ozone Layer (the "Montreal Protocol"), adopted at Montreal on September 15-17, 1997, by the ninth meeting of the parties to the Montreal Protocol. Washington: U.S. Government Printing Office. 1999.