Guha, A. Guha, A. Quantitative Aptitude For Competitve Examinations Tips , Techniques and short -cut Methods - 3rd. Ed. - New Delhi Tata McGraw-Hill Education Pvt. Limited 2000 - xvi, 350 p. 20 cm. Text in English ISBN: 007463626X Dewey Class. No.: 621.38 / GUH