WIDJAJA, IVAN (2013) KARAKTERISTIK FISIKOKIMIA ROTI KUKUS DENGAN PENAMBAHAN PEWARNA ALAMI EKSTRAK BIT MERAH (Beta vulgaris L.). Other thesis, Prodi Teknologi Pangan UNIKA Soegijapranata.

WIDJAJA, IVAN (2013) PROSES PENGEMASAN PRIMER MINUMAN SERBUK MARIMAS MENGGUNAKAN MESIN MULTI LINE PADA PT MARIMAS PUTERA KENCANA. Project Report. Fakultas Teknologi Pertanian, Unika Soegijapranta, Semarang. (Unpublished)

ANDREA, JESSICA and WIDJAJA, IVAN and Ananingsih, Kristina and PUTRI, NOVITA IKA Effect of Bread Improver Addition and Purple Sweet Potato (Ipomoea batatas) Flour Substitution to Steamed Bread Quality. Global Insight for the Future of Food Production (2nd International Student Conference).