Cita APA (7th ed.)

Boulding, E., & Boulding, K. E. (1995). The future: Images and processes. Sage Publications.

Cita Chicago (17th ed.)

Boulding, Elise, i Kenneth E. Boulding. The Future: Images and Processes. Thousand Oaks, Calif.: Sage Publications, 1995.

Cita MLA (8th ed.)

Boulding, Elise, i Kenneth E. Boulding. The Future: Images and Processes. Sage Publications, 1995.