Gaya APA

PURWANTO, D. (2017). The role of school principal and school supervisors in improving teacher competency in the application of leading saintific approach in vocational high school . Malang: Universitas Brawijaya.

Gaya MLA

PURWANTO, Djandji. "The role of school principal and school supervisors in improving teacher competency in the application of leading saintific approach in vocational high school". Malang: Universitas Brawijaya, 2017. Artikel.