Gaya APA

Sudradjat, A., Pardyanto, L. (1978). Report on Mayon Volcano Visit, The Philippines (Sponsored by UNESCO) (June 1978). Bandung: U S Geological Survey.

Gaya MLA

Sudradjat, A.., Pardyanto, L.. "Report on Mayon Volcano Visit, The Philippines (Sponsored by UNESCO)". June 1978 Bandung: U S Geological Survey, 1978. Text.