Cita APA (7th ed.)
Lewis, R. S., & Clark, G. B. (1964). Elements of mining (3rd ed.). John Wiley & Sons.
Cita Chicago (17th ed.)
Lewis, Robert S., i George B. Clark. Elements of Mining. 3rd ed. New York: John Wiley & Sons, 1964.
Cita MLA (9th ed.)
Lewis, Robert S., i George B. Clark. Elements of Mining. 3rd ed. John Wiley & Sons, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.