Pettegree, A., & Pettegree, A. (2016). The great reformers: Lucas Cranach's service to the Reformation went beyond creating iconic images of the Protestant reformer Martin Luther - by radically transforming the printing process, he ensured that Luther's message spread fast and far. Apollo, 184(646), pp. 78-83.

Pettegree, Andrew, and Andrew Pettegree. "The Great Reformers: Lucas Cranach's Service to the Reformation Went Beyond Creating Iconic Images of the Protestant Reformer Martin Luther - By Radically Transforming the Printing Process, He Ensured That Luther's Message Spread Fast and Far." Apollo 184, no. 646 (2016): 78-83.

Pettegree, Andrew, and Andrew Pettegree. "The Great Reformers: Lucas Cranach's Service to the Reformation Went Beyond Creating Iconic Images of the Protestant Reformer Martin Luther - By Radically Transforming the Printing Process, He Ensured That Luther's Message Spread Fast and Far." Apollo 184.646 (2016): 78-83.