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

Azar, B, S. (1989). Understanding and using : english grammar second edition (-). Amerika serikat: Prentice Hall.

Gaya MLA

Azar, Betty, Schrampfer. "Understanding and using : english grammar second edition". - Amerika serikat: Prentice Hall, 1989. UMUM.