Cook, E. F. (1966). Tufflavas and ignimbrites: A survey of Soviet studies. American Elsevier Pub. Co.
Cita Chicago (17th ed.)Cook, Earl Ferguson. Tufflavas and Ignimbrites: A Survey of Soviet Studies. New York: American Elsevier Pub. Co, 1966.
Cita MLA (9th ed.)Cook, Earl Ferguson. Tufflavas and Ignimbrites: A Survey of Soviet Studies. American Elsevier Pub. Co, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.