Gaya APA

SOMMEN, J, V, D, H, T, M, A. (1990). Remote sensing and grandwater flow system analysis in volcanic terrains, West Java . : Iwaco.

Gaya MLA

SOMMEN, J.J., Van, Der;, HASUDUNGAN,, T.;, MEIJERINK,, A.M.J.. "Remote sensing and grandwater flow system analysis in volcanic terrains, West Java". : Iwaco, 1990. Laporan.