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

Saphiro, D. et al (2022). Principles of Economics 3e (E-Book) . Texas: OpenStax.

Gaya MLA

Saphiro, David. et al. "Principles of Economics 3e (E-Book)". Texas: OpenStax, 2022. Electronic Resources.