Gaya APA

Observations Stratigraphy and Eruptive Processes of the 1990 Eruption of Kelud Volcano, Indonesia. (). Amsterdam: Elsevier Science Publishers B.V..

Gaya MLA

Observations Stratigraphy and Eruptive Processes of the 1990 Eruption of Kelud Volcano, Indonesia. . Amsterdam: Elsevier Science Publishers B.V., . .