@book{10587,
	author = {Erich Gamma},
	title = {Design Patterns: Elements of Reusable Object-Oriented Software},
	publisher = {Pearson},
	year = {1994},
	address = {New Delhi},
	edition = {1st},
	url = {https://ebookcentral.proquest.com/lib/gzsptuc/detail.action?docID=5126003&query=Design+Patterns%3A+Elements+of+Reusable+Object-Oriented+Software}
}