@book{27990,
	author = {Unus Iqbal, Saad Bin Saleem, Muhammad Sabih-ud-Din & Sheikh Muhammad Waleed},
	title = {Programmable Logic Controller Trainer},
	publisher = {UIT,},
	year = {2009},
	address = {Karachi:},
	url = {https://drive.google.com/file/d/1BcG0b14oDWKhhyORkCTUYk6fpnhOLyJS/view?usp=sharing}
}