Please click on the link to view William Burt Pope’s Treatment of the Gospel Vocation/Call from pp. 335-347 of the second volume of his 3-volume systematic theology, A Compendium of Christian Theology. The full 3 volume systematic theology can be accessed here. Here are the main sections of this excerpt:
Introduction: The Gospel Call and Terms
Vocation and Universal Redemption
Historical Process
The Indirect Call
The Direct Call
The Nature of the Gospel Call
The Offer of Salvation
In the Church Through the Word
The Divine Intention in the Call
Calling and Election
Contingency