Cita APA (7th ed.)

Pickering, K. T., & Owen, L. A. (1997). An introduction to global environmental issues (2nd ed.). Routledge.

Cita Chicago (17th ed.)

Pickering, Kevin T., i Lewis A. Owen. An Introduction to Global Environmental Issues. 2nd ed. London: Routledge, 1997.

Cita MLA (9th ed.)

Pickering, Kevin T., i Lewis A. Owen. An Introduction to Global Environmental Issues. 2nd ed. Routledge, 1997.