Cita APA (7a ed.)

UAL Corporation & United Airlines. (1999). 1998 annual report. UAL Corporation.

Cita Chicago Style (17a ed.)

UAL Corporation y United Airlines. 1998 Annual Report. Chicago: UAL Corporation, 1999.

Cita MLA (8a ed.)

UAL Corporation y United Airlines. 1998 Annual Report. UAL Corporation, 1999.