Cita APA (7a ed.)

Glenn, J. C. ., & Gordon, T. J.. (2004). Futures research methodology. The United Nations University.

Cita Chicago Style (17a ed.)

Glenn, Jerome C. , y Theodore J. Gordon. Futures Research Methodology. [S. l.]: The United Nations University, 2004.

Cita MLA (9a ed.)

Glenn, Jerome C. , y Theodore J. Gordon. Futures Research Methodology. The United Nations University, 2004.