[et.al], W. H. .. (1982). A geologic time scale. Cambridge University.
Chicago Style (17th ed.) Citation[et.al], WB Harland ... A Geologic Time Scale. Cambridge University, 1982.
MLA (8th ed.) Citation[et.al], WB Harland ... A Geologic Time Scale. Cambridge University, 1982.
Warning: These citations may not always be 100% accurate.