Clean ABAP a style guide for developers - Haeuptle, Klaus; Hoffmann, Florian; Jordão, Rodrigo (Rheinwerk Publishing, 2021)
Auf dem Cover: "learn to write readable and maintanable ABAP code, improve the way you work with classes, interfaces, methods, variables, tables, and more, understand how to choose useful names, write strong comments, and format code correctly"