ABAP RESTful Programming Model

by Stefan Haas, Bince Mathew

ABAP/4

by Bernd Matzke

Developing SAP's R/3 applications with ABAP/4

by Rüdiger Kretschmer

Writing SAP ABAP/4 programs

by Ted Hoffman

Introduction to ABAP/4 programming for SAP

by Gareth De Bruyn

ABAP/4

by Bernd Matzke

ABAP/4, programming the SAP R/3 system

by Bernd Matzke

ABAP/4 Programmiertechniken

by Thomas Winkler

Ein SAP-R/3-System basiert, wie die meisten Leser sicher wissen, auf einer Client-Server-Architektur.

Sams teach yourself ABAP/4 in 21 days

by Ken Greenwood

SAP R/3 ABAP/4 command reference

by Dennis Barrett

Software Development for SAP R/3

by Ulrich Mende

SAP AG, in a spectacular development history, has developed the worldwide largest business DP system: R/3.

SAP certified development associate--ABAP with SAP NetWeaver...

by Puneet Asthana

Advanced ABAP programming for SAP

by Gareth De Bruyn

ABAP objects

by Keller, Horst

ABAP cookbook

by James Wood

Official ABAP programming guidelines

by Keller, Horst

Getting started with ABAP

by O'Neill, Brian (Computer programmer)

Object-oriented programming with ABAP Objects

by James Wood

Introduction to ABAP Programming for SAP®

by Gareth M. De Bruyn, Robert Lyfareff

SAP ABAP handbook

by Kogent Learning Solutions, Inc