Cita APA (7a ed.)

Darvill, P. A., Stirling, W. R., & Stubley, T. (1979). Our world today: Social and economic (1. printed.). Schofield & Sims.

Cita Chicago Style (17a ed.)

Darvill, P. A., W. R. Stirling, y Trevor Stubley. Our World Today: Social and Economic. 1. printed. Huddersfield: Schofield & Sims, 1979.

Cita MLA (9a ed.)

Darvill, P. A., et al. Our World Today: Social and Economic. 1. printed. Schofield & Sims, 1979.