Gaya APA

Suryadharma, H., Wigroho, H, Y. (1998). Alat alat berat / Hendra Suryadharma (Edisi 7 Jilid 1). Yogyakarta: Universtas Atma Jaya.

Gaya MLA

Suryadharma, Hendra., Wigroho, Haryanto, Yoso. "Alat alat berat / Hendra Suryadharma". Edisi 7 Jilid 1 Yogyakarta: Universtas Atma Jaya, 1998. Text.