A. Putri and I. Walfindo, “THE ADDED VALUE OF PURPLE SWEET POTATO INTO PROCESSED PURPLE SWEET MILK PIE IN HARAU DISTRICT, LIMAPULUH KOTA REGENCY: NILAI TAMBAH UBI JALAR UNGU MENJADI OLAHAN PIE SUSU UBI UNGU DI KECAMATAN HARAU, KABUPATEN LIMAPULUH KOTA”, J. AgribiSains, vol. 8, no. 1, pp. 13–19, Apr. 2022.