International Geological Correlation Programme. Project 156 Phosphorites, Notholt, A. J. G., Sheldon, R. P., & Davidson, D. F. (1989). Phosphate deposits of the world. Cambridge University Press.
Chicago Style (17th ed.) CitationInternational Geological Correlation Programme. Project 156 Phosphorites, A. J. G. Notholt, R. P. Sheldon, and D. F. Davidson. Phosphate Deposits of the World. Cambridge: Cambridge University Press, 1989.
MLA (9th ed.) CitationInternational Geological Correlation Programme. Project 156 Phosphorites, et al. Phosphate Deposits of the World. Cambridge University Press, 1989.
Warning: These citations may not always be 100% accurate.