Gaya APA

Journal of Volcanology and Geothermal Research Vol. 11 No. 2-4 December 1981. (). Amsterdam: Elsevier Science Publishers B.V..

Gaya MLA

Journal of Volcanology and Geothermal Research Vol. 11 No. 2-4 December 1981. . Amsterdam: Elsevier Science Publishers B.V., . .