Gaya APA

Sutyadharma, H., Wigroho, H, Y. (). Alat-Alat Berat . Yogyakarta: Universitas Atma Jaya.

Gaya MLA

Sutyadharma, Hendra., Wigroho, Haryanto, Yoso. "Alat-Alat Berat". Yogyakarta: Universitas Atma Jaya, . Book.