Sandhya Aggarwal. (2012). Library services: Challenges and solutions in digital era. ESS ESS Pubs.
استشهاد بنمط شيكاغوSandhya Aggarwal. Library Services: Challenges and Solutions in Digital Era. ESS ESS Pubs, 2012.
MLA استشهادSandhya Aggarwal. Library Services: Challenges and Solutions in Digital Era. ESS ESS Pubs, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.