North Sulawesi Regional Investment Coordinating Board, 1993
Buku Teks
Daya Upaya, 1967
Buku Teks
Horas Djulius, author
Faculty of Economic and Business UIN Syarif Hidayatullah, 2019
Artikel Jurnal
Pos Tiga , 1971
Buku Teks
Indonesian Embassy, 1967
Buku Teks