Cita APA

Geological Society of London, Harland, W. B., Francis, E. H., & Evans, P. (1971). The phanerozoic time-scale: A supplement. Geological Society of London.

Citación estilo Chicago

Geological Society of London, W. B. Harland, E. H. Francis, and P. Evans. The Phanerozoic Time-scale: A Supplement. London: Geological Society of London, 1971.

Cita MLA

Geological Society of London, et al. The Phanerozoic Time-scale: A Supplement. Geological Society of London, 1971.