APA (7 वां संस्करण) प्रशस्ति पत्र
Shreves, R. (2012). Drupal search engine optimization: Drive people to your site with this supercharged guide to Drupal SEO. Packt Pub..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Shreves, Ric. Drupal Search Engine Optimization: Drive People to Your Site with This Supercharged Guide to Drupal SEO. Birmingham: Packt Pub., 2012.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Shreves, Ric. Drupal Search Engine Optimization: Drive People to Your Site with This Supercharged Guide to Drupal SEO. Packt Pub., 2012.
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