APA

United States, Greece & United States. (2017). Defense: agreement between the United States of America and Greece extending Agreement of July 8, 1990, effected by exchange of notes at Athens, May 19 and July 7, 2017. [Washington, D.C.]: United States Department of State.

Chicago

United States, Greece and United States. 2017. Defense: agreement between the United States of America and Greece extending Agreement of July 8, 1990, effected by exchange of notes at Athens, May 19 and July 7, 2017. [Washington, D.C.]: United States Department of State.

Harvard

United States, Greece and United States. (2017). Defense: agreement between the United States of America and Greece extending Agreement of July 8, 1990, effected by exchange of notes at Athens, May 19 and July 7, 2017. [Washington, D.C.]: United States Department of State.

MLA

United States, Greece and United States. Defense: agreement between the United States of America and Greece extending Agreement of July 8, 1990, effected by exchange of notes at Athens, May 19 and July 7, 2017. [Washington, D.C.]: United States Department of State. 2017.