Suryadharma, H. (1998). Alat- Alat Berat/ Hendra Suryadharma; Haryanto Yoso Wigroho. Yogyakarta : Universitas Atma Jaya.
Chicagoスタイル(17版)引用形式Suryadharma, Hendra. Alat- Alat Berat/ Hendra Suryadharma; Haryanto Yoso Wigroho. Yogyakarta : Universitas Atma Jaya, 1998.
MLA(8版)引用形式Suryadharma, Hendra. Alat- Alat Berat/ Hendra Suryadharma; Haryanto Yoso Wigroho. Yogyakarta : Universitas Atma Jaya, 1998.
警告: この引用は必ずしも正確ではありません.