APA

United States, Greece & United States. (2018). Defense: cooperation : agreement between the United States of America and Greece extending Agreement of July 8, 1990, as extended, effected by exchange of notes at Athens, April 30 and June 7, 2018; entered into force June 7, 2018. [Washington, D.C.]: United States Department of State.

Chicago

United States, Greece and United States. 2018. Defense: cooperation : agreement between the United States of America and Greece extending Agreement of July 8, 1990, as extended, effected by exchange of notes at Athens, April 30 and June 7, 2018; entered into force June 7, 2018. [Washington, D.C.]: United States Department of State.

Harvard

United States, Greece and United States. (2018). Defense: cooperation : agreement between the United States of America and Greece extending Agreement of July 8, 1990, as extended, effected by exchange of notes at Athens, April 30 and June 7, 2018; entered into force June 7, 2018. [Washington, D.C.]: United States Department of State.

MLA

United States, Greece and United States. Defense: cooperation : agreement between the United States of America and Greece extending Agreement of July 8, 1990, as extended, effected by exchange of notes at Athens, April 30 and June 7, 2018; entered into force June 7, 2018. [Washington, D.C.]: United States Department of State. 2018.