Lua APA (7ú heag.)

Shreves, R. (2008). Drupal 6 themes: Create a new theme for your Drupal 6 site with a clean layout and powerful CSS styling. Packt Publishing.

Lua i Stíl Chicago (17ú heag.)

Shreves, Ric. Drupal 6 Themes: Create a New Theme for Your Drupal 6 Site with a Clean Layout and Powerful CSS Styling. Birmingham, U.K.: Packt Publishing, 2008.

Lua MLA (9ú heag.)

Shreves, Ric. Drupal 6 Themes: Create a New Theme for Your Drupal 6 Site with a Clean Layout and Powerful CSS Styling. Packt Publishing, 2008.

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