Cita APA (7th ed.)

Boulding, K. E., Boulding, E., & Burgess, G. M. (1980). The social system of the planet earth. Addison-Wesley.

Cita Chicago (17th ed.)

Boulding, Kenneth Ewart, Elise Boulding, i Guy M. Burgess. The Social System of the Planet Earth. Reading, Mass: Addison-Wesley, 1980.

Cita MLA (9th ed.)

Boulding, Kenneth Ewart, et al. The Social System of the Planet Earth. Addison-Wesley, 1980.