Helmi Effendy. (2013). Epidemik. Grup Buku Karangkraf.
Chicago Style (17th ed.) CitationHelmi Effendy. Epidemik. Shah Alam: Grup Buku Karangkraf, 2013.
MLA (8th ed.) CitationHelmi Effendy. Epidemik. Grup Buku Karangkraf, 2013.
Warning: These citations may not always be 100% accurate.