(2003). Teknik samplingSugiarto [et.al.]. Gramedia Pustaka Utama.
Chicago Style (17th ed.) CitationTeknik SamplingSugiarto [et.al.]. Gramedia Pustaka Utama, 2003.
MLA (8th ed.) CitationTeknik SamplingSugiarto [et.al.]. Gramedia Pustaka Utama, 2003.
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