Yayasan Obor Indonesia, 1987
Buku Teks
Development Assistance, [date of publication not identified]
Buku Teks
Nandha Afrilandha, author
Universitas Jenderal Soedirman. Fakultas Pertanian, 2018
Artikel Jurnal
John Wiley & Sons, 1977
Buku Teks
N. Daldjonoeni,
Alumni, 1982
Buku Teks