Wilson, Donald W., author
Yayasan Persada Nusantara, 1989
Buku Teks
Artikel Jurnal
Onder, Feryal Cotur, author
2005
Artikel Jurnal
Indonesian agency for agricultural research and development,
Majalah, Jurnal, Buletin
edited by Truman Simanjuntak; English translation by: Nin Bakdisoemanto, Ig Krishna Dharma
Gadjah Mada University Press, 2016
Buku Teks