Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

ebrary, Inc, James A. Leith, Raymond A. Price, e John H. Spencer. Planet Earth: Problems and Prospects. Montreal ; Buffalo: McGill-Queen's University Press, 1995.

Citatione MLA (9a ed.)

ebrary, Inc, et al. Planet Earth: Problems and Prospects. McGill-Queen's University Press, 1995.