Types of Atheism
Prof. Flint distinguishes three kinds of theoretical atheism, namely, (1) dogmatic atheism, which flatly denies that there is a Divine Being; (2) sceptical atheism, which doubts the ability of the human mind to determine, whether or not there is a God; and (3) critical atheism, which maintains that there is no valid proof for the existence of God.
Systematic Theology
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Berkhof, L. (1938). Systematic Theology. Wm. B Eerdmans. x-devonthink-item://2858E703-ACC6-4343-8F37-BCA9C76C078D?reveal=1