Gaya APA

Journal of Volcanology and Geothermal Research Vol. 7 No.1-2 February, 1980. (). Amsterdam: Elsevier Science Publishers B.V..

Gaya MLA

Journal of Volcanology and Geothermal Research Vol. 7 No.1-2 February, 1980. . Amsterdam: Elsevier Science Publishers B.V., . .