APA (7th ed.) Zitazioa
ebrary, Inc, Eksterowicz, A. J., & Hastedt, G. P. (2009). The presidency of the United States: New issues and developments. Nova Science Publishers.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, Anthony J. Eksterowicz, eta Glenn P. Hastedt. The Presidency of the United States: New Issues and Developments. New York: Nova Science Publishers, 2009.
MLA (9th ed.) Zitazioa
ebrary, Inc, et al. The Presidency of the United States: New Issues and Developments. Nova Science Publishers, 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.