APA (7th ed.) Citation

Juniper, T., Monbiot, G., & Smit, T. (2006). Capitalism, as if…. Green Futures, 56, 49.

Chicago Style (17th ed.) Citation

Juniper, Tony, George Monbiot, and Tim Smit. "Capitalism, as If…." Green Futures 56 (2006): 49.

MLA (9th ed.) Citation

Juniper, Tony, et al. "Capitalism, as If…." Green Futures, 56, 2006, p. 49.