Eko Budihardjo, 1944-2014
Gajah Mada University Press, 1991
Buku Teks SO
Donhead,
Majalah, Jurnal, Buletin
EKo Budiharjo
Yogyakarta Gadjah Mada University 1991,
Buku Teks
edited by William J. Cavanaugh and Joseph A. Wilkes
John Wiley & Sons, 1999
Buku Teks SO
Wakita, Osamu A.
John Wiley & Sons, 1977
Buku Teks SO