Krenn, P. (2011). SilverStripe 2.4 module extension, themes, and widgets: Beginner's guide : create smashing SilverStripe applications by extending modules, creating themes, and adding widgets. Packt Pub.
Chicago Style (17th ed.) CitationKrenn, Philipp. SilverStripe 2.4 Module Extension, Themes, and Widgets: Beginner's Guide : Create Smashing SilverStripe Applications by Extending Modules, Creating Themes, and Adding Widgets. Birmingham, U.K: Packt Pub, 2011.
MLA (9th ed.) CitationKrenn, Philipp. SilverStripe 2.4 Module Extension, Themes, and Widgets: Beginner's Guide : Create Smashing SilverStripe Applications by Extending Modules, Creating Themes, and Adding Widgets. Packt Pub, 2011.
Warning: These citations may not always be 100% accurate.