APA (7th ed.) Citation

Keller, H., & Jacobitz, J. (2003). ABAP objects reference: A comprehensive guide to all ABAP-language elements in two volumes. SAP Press.

Chicago Style (17th ed.) Citation

Keller, Horst, and Joachim Jacobitz. ABAP Objects Reference: A Comprehensive Guide to All ABAP-language Elements in Two Volumes. New York [u.a.]: SAP Press, 2003.

MLA (9th ed.) Citation

Keller, Horst, and Joachim Jacobitz. ABAP Objects Reference: A Comprehensive Guide to All ABAP-language Elements in Two Volumes. SAP Press, 2003.