Gaya APA

kurniawan, P., Risky, G. (2021). Applied geotechnics for engineers (Cet. 1). Yogyakarta: Andi Offset.

Gaya MLA

kurniawan, Paulus., Risky, Giovanny. "Applied geotechnics for engineers". Cet. 1 Yogyakarta: Andi Offset, 2021. Text.