Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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