1. Jurnal Hasil Riset
2. Suhardi.Universitas Mulawarman.Kalimantan Timur.Indonesia
3. www.kompasiana.com
4. id.tesis.com
5. www.feb.ui.ac.id
6. E-JURNAL
7. Open Science Journal - osjournal.org
8. Jurnal Online
9. Suardiana Utama
10. idtesis.com
Happy Swimming and browsing :v
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