Cita APA (7a ed.)

Glenn, J. C. (1998). 1998 state of the future: Issues and opportunities. American council for the united nations university.

Cita Chicago Style (17a ed.)

Glenn, Jerome C. 1998 State of the Future: Issues and Opportunities. Nueva York: American council for the united nations university, 1998.

Cita MLA (9a ed.)

Glenn, Jerome C. 1998 State of the Future: Issues and Opportunities. American council for the united nations university, 1998.