Gaya APA

Verstappen, H, T. (2000). Out line of the geomorphology of Indonesia: a case study on tropical geomorphology of a tectogene region (with a geomorphological map 1 : 5.000.000) . Enschade: ITC.

Gaya MLA

Verstappen, Herman, Th.. "Out line of the geomorphology of Indonesia: a case study on tropical geomorphology of a tectogene region (with a geomorphological map 1 : 5.000.000)". Enschade: ITC, 2000. Text.