APA (7th ed.) Citation

(2000). NATO enters the 21st century. Cass.

Chicago Style (17th ed.) Citation

NATO Enters the 21st Century. London [u.a.]: Cass, 2000.

MLA (9th ed.) Citation

NATO Enters the 21st Century. Cass, 2000.

Warning: These citations may not always be 100% accurate.