Leet, L. D. (1964). Earthquake: Discoveries in seismology. Dell.
Cita Chicago (17th ed.)Leet, L. Don. Earthquake: Discoveries in Seismology. N. Y: Dell, 1964.
Cita MLA (9th ed.)Leet, L. Don. Earthquake: Discoveries in Seismology. Dell, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.