Barnes, C. W. (1980). Earth, time, and life: An introduction to geology. John Wiley.
Citazione stile Chigago Style (17a edizione)Barnes, Charles W. Earth, Time, and Life: An Introduction to Geology. New York:: John Wiley, 1980.
Citatione MLA (9a ed.)Barnes, Charles W. Earth, Time, and Life: An Introduction to Geology. John Wiley, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.