Sumber : https://economy.okezone.com/read/2019/09/13/320/2104532/manjakan-pelanggan-giant-kembali-berinovasi-untuk-kenyamanan-berbelanja?page=2https://ekonomi.bisnis.com/read/20190913/12/1148045/hadapi-persaingan-begini-strategi-giantfile:///D:/KULIAH/semester%204/retail%20management/tugas%20sampai%20UAS/Pertemuan%2015%20Penentuan%20Harga%20Ritel.pdf