APA (7th ed.) Citation

O'Neill, B., & Perfiljeva, J. (2020). ABAP: An introduction (2nd edition, updated and expanded.). Rheinwerk Publishing.

Chicago Style (17th ed.) Citation

O'Neill, Brian, and Jelena Perfiljeva. ABAP: An Introduction. 2nd edition, updated and expanded. Bonn ; Boston: Rheinwerk Publishing, 2020.

MLA (9th ed.) Citation

O'Neill, Brian, and Jelena Perfiljeva. ABAP: An Introduction. 2nd edition, updated and expanded. Rheinwerk Publishing, 2020.