Langley, A. (2007). Seri pengetahuan bencana alam. Erlangga.
Chicago Style (17th ed.) CitationLangley, Andrew. Seri Pengetahuan Bencana Alam. Erlangga, 2007.
MLA (8th ed.) CitationLangley, Andrew. Seri Pengetahuan Bencana Alam. Erlangga, 2007.
Warning: These citations may not always be 100% accurate.