Cutts, A., & Graser, A. (2018). Learn QGIS: Your step-by-step guide to the fundamental of QGIS 3.4 (Fourth edition.). Packt.
Chicago Style (17th ed.) CitationCutts, Andrew, and Anita Graser. Learn QGIS: Your Step-by-step Guide to the Fundamental of QGIS 3.4. Fourth edition. Birmingham: Packt, 2018.
MLA (9th ed.) CitationCutts, Andrew, and Anita Graser. Learn QGIS: Your Step-by-step Guide to the Fundamental of QGIS 3.4. Fourth edition. Packt, 2018.
Warning: These citations may not always be 100% accurate.