Harya, SP., M.Agr, Dr. Gyska Indah, Prof. Dr. Ir. Teguh Soedarto, M.P., and Prof. Dr. Ir. Hamidah Hendrarini, M.Si. Standar Mutu Dan Sertifikasi Produk Ekspor Komoditas Perkebunan. PT. Ghani Press Group, 2026. Accessed July 22, 2026. https://e-book.ghanipress.com/index.php/ghanipress/catalog/book/55.