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

Drucker, P, F. (1999). Management Challenges fot the 21st Century (Edisi 1). New York: Harper Business.

Gaya MLA

Drucker, Peter, F.. "Management Challenges fot the 21st Century". Edisi 1 New York: Harper Business, 1999. Manajemen Administrasi D3.