APA (7th ed.) Citation

Astuti, R., Mallongi, A., & Rauf, A. Natural enrichment of chromium and nickel in the soil surrounds the karst watershed. GJESM Publisher.

Chicago Style (17th ed.) Citation

Astuti, R.D.P, A. Mallongi, and A.U Rauf. Natural Enrichment of Chromium and Nickel in the Soil Surrounds the Karst Watershed. GJESM Publisher.

MLA (9th ed.) Citation

Astuti, R.D.P, et al. Natural Enrichment of Chromium and Nickel in the Soil Surrounds the Karst Watershed. GJESM Publisher.

Warning: These citations may not always be 100% accurate.