APA (7e ed.) Bronvermelding
ebrary, Inc, Leith, J. A., Price, R. A., & Spencer, J. H. (1995). Planet earth: Problems and prospects. McGill-Queen's University Press.
Chicago (17e ed.) Bronvermelding
ebrary, Inc, James A. Leith, Raymond A. Price, en John H. Spencer. Planet Earth: Problems and Prospects. Montreal ; Buffalo: McGill-Queen's University Press, 1995.
MLA (9e ed.) Bronvermelding
ebrary, Inc, et al. Planet Earth: Problems and Prospects. McGill-Queen's University Press, 1995.
Let op: Deze citaties zijn niet altijd 100% accuraat.