Cita APA (7a ed.)

Leith, J. A., Price, R. A., & Spencer, J. H. (1995). Planet earth: Problems and prospects. McGill-Queen's University Press.

Cita Chicago Style (17a ed.)

Leith, James A., Raymond A. Price, y John H. Spencer. Planet Earth: Problems and Prospects. Montreal [Que.]: McGill-Queen's University Press, 1995.

Cita MLA (8a ed.)

Leith, James A., et al. Planet Earth: Problems and Prospects. McGill-Queen's University Press, 1995.