Cita APA (7th ed.)

Hariningsih, H., Sumpena, S., & Sukarjo, H. (2020). The effectivity of used-oil as quenching medium of 42-CrMo4 steel for automotive materials. Universitas Muhammadiyah Surakarta.

Cita Chicago (17th ed.)

Hariningsih, Hariningsih, Sumpena Sumpena, i Heribertus Sukarjo. The Effectivity of Used-oil as Quenching Medium of 42-CrMo4 Steel for Automotive Materials. Universitas Muhammadiyah Surakarta, 2020.

Cita MLA (9th ed.)

Hariningsih, Hariningsih, et al. The Effectivity of Used-oil as Quenching Medium of 42-CrMo4 Steel for Automotive Materials. Universitas Muhammadiyah Surakarta, 2020.