Sidauruk, Ingen Augdiga
Fakultas Teknik Universitas Indonesia, 2014
UI - Tesis Membership
Pusat Penelitian dan Pengembangan Sumber Daya Air, 2005
Buku Referensi
Edi Wahyu Pudjianto
Bina Indra Karya, 1984
Buku Teks SO
Centre for research of human resources and the nvironment University of Indonesia, 1991
Buku Referensi
Rich, Linvil G.
McGraw-Hill, 1973
Buku Teks SO