Cita APA (7a ed.)

Citigroup. (1999). Citigroup 1998. Citigroup.

Cita Chicago Style (17a ed.)

Citigroup. Citigroup 1998. New York: Citigroup, 1999.

Cita MLA (8a ed.)

Citigroup. Citigroup 1998. Citigroup, 1999.