Singh, S. (1999). Studies in touriesm: Key issues for effective mangement.1999. APH Pub.
शिकागो स्टाइल उद्धरणSingh, Sagar. Studies in Touriesm: Key Issues for Effective Mangement.1999. New Delhi: APH Pub, 1999.
एमएलए उद्धरणSingh, Sagar. Studies in Touriesm: Key Issues for Effective Mangement.1999. APH Pub, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.