Gaya APA

Suryadharma, H., Wigroho, H, Y. (2013). Alat-alat berat (ed. revisi). Yogyakarta: Universitas Atma Jaya Yogyakarta.

Gaya MLA

Suryadharma, Hendra., Wigroho, Haryanto, Yoso. "Alat-alat berat". ed. revisi Yogyakarta: Universitas Atma Jaya Yogyakarta, 2013. Text.