Knuti, Leo Leonard, 1903-
Prentice-Hall, 1962
Buku Teks
Hary Christady Hardiyatmo
Gadjah Mada University Press, 2013
Buku Teks
edited by M.R. Carter and E.G. Gregorich
Taylor & Francis , 2008
Buku Teks
Tanzil, Gunawan
Program studi magister Teknik Siping Univ.Sriwijaya, 2006
Artikel Jurnal
UI - Skripsi Open