Cita APA (7th ed.)

(1977). The Delphi Method: Techniques and applications. Addison-wesley.

Cita Chicago (17th ed.)

The Delphi Method: Techniques and Applications. London: Addison-wesley, 1977.

Cita MLA (9th ed.)

The Delphi Method: Techniques and Applications. Addison-wesley, 1977.