Cita APA (7th ed.)
ebrary, Inc. (2004). A vision for the International Polar Year 2007-2008. National Academies Press.
Cita Chicago (17th ed.)
ebrary, Inc. A Vision for the International Polar Year 2007-2008. Washington, D.C.: National Academies Press, 2004.
Cita MLA (9th ed.)
ebrary, Inc. A Vision for the International Polar Year 2007-2008. National Academies Press, 2004.
Atenció: Aquestes cites poden no estar 100% correctes.