(et.al), S. (2001). Teknik sampling. Gramedia Utama.
Chicago Style (17th ed.) Citation(et.al), Sugiarto. Teknik Sampling. Gramedia Utama, 2001.
MLA (9th ed.) Citation(et.al), Sugiarto. Teknik Sampling. Gramedia Utama, 2001.
Warning: These citations may not always be 100% accurate.