Tangkilisan, Yuda Benharry, author
Faculty of Humanities University of Indonesia, 2003
Artikel Jurnal
Ahmad Subardjo Djojoadisuryo, author
Yayasan Idayu , 1975
Buku Teks
Sewan Susanto, author
Gajah Mada University Press, 1985
Buku Teks
Sewan Susanto, author
Gadjah Mada University , 1985
Buku Teks
Tobing, Rufinus, author
Dewan Perniagaan dan Perusahaan, 1960
Buku Teks