Gaya APA

RYBAR, J, S, J, (, E, A. (2002). Landslides; Proceeding of the 1st European Conference of landslides Progue etc . : A.A. Balkema.

Gaya MLA

RYBAR, Jan;, STEMBERK,, Josef, (, Et, Al). "Landslides; Proceeding of the 1st European Conference of landslides Progue etc". : A.A. Balkema, 2002. Buku.