Generally speaking, one can divide theological reference tools into three broad categories.
Systematic Theologies – Seek to present theological material systematically according to specific categories that frame the discussion, e.g., the nature of God, the work of the Spirit, the essence of sin, etc.
Biblical Theologies – Seek to present theological material according to categories more directly related to those of the Biblical authors, books, and corpuses; seek to give special attention to the progressive unfolding of this theological material across Biblical history and the Biblical canon.
Historical Theologies – Seek to present developmnent of Christian theology throughout church history and spanning various theological traditions. Some are organized according to historical period while others are organized topically.