%0 Journal Article %A farajzadeh, Mohammad, Sarmadi, Mohammad Reza %T Study and analysis of the nature, principles, extent, types and sources of epistemology %J Theological – Doctrinal Research (Islamic Azad University-Saveh Branch) %V 9 %N 35 %P 195-226 %D 2019 %R %U https://rimag.ir/fa/Article/19139