Gaya APA

Suryadharma, H., Wigroho, H, Y. (1998). Alat-Alat Berat (ed.1 Cet.1). liberti,Yogyakarta: Penerbitan Universitas Atma Jaya Yogyakarta.

Gaya MLA

Suryadharma, Hendra., Wigroho, Haryanto, Yoso. "Alat-Alat Berat". ed.1 Cet.1 liberti,Yogyakarta: Penerbitan Universitas Atma Jaya Yogyakarta, 1998. Textbook.