Istanti, Lulu Nurul. “PENGARUH HARGA SAHAM, TRADING VOLUME ACTIVITY DAN RISIKO SAHAM TERHADAP BID-ASK SPREAD (Studi Pada Perusahaan LQ-45 Di Bursa Efek Jakarta)”. Jurnal Ekonomi Modernisasi 5, no. 3 (October 5, 2009): 199–210. Accessed February 8, 2026. http://ejournal.unikama.ac.id/index.php/JEKO/article/view/229.