https://dispora.pekanbaru.go.id/ https://iran.unhabitat.org/ https://labkes.pekanbaru.go.id/ https://phki.untan.ac.id/ https://feb.untan.ac.id/ https://heylink.me/jagungbetslot88uangasli/

Gaya APA

Olii, H. (2007). Public speaking . Jakarta: PT Indeks.

Gaya MLA

Olii, Helena. "Public speaking". Jakarta: PT Indeks, 2007. UMUM.