CHAPTER

SHINGLEE PUBLISHERS PTE LTD

120 Hillview Avenue #05-06/07 Kewalram Hillview Singapore 669594 Tel: 6760 1388 Fax: 6762 5684 Email: info@shinglee.com.sg http://www.shinglee.com.sg

©SHINGLEE PUBLISHERS PTE LTD

All rights reserved. No part of this book may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior permission of the Publishers.

First Published 1982 Reprinted 1983, 1984, 1985, 1986 Second Edition 1987 Reprinted 1987, 1988, 1989, 1990, 1991 Third Edition 1992 Reprinted 1992, 1993, 1994, 1995 Fourth Edition 1997 Reprinted 1997, 1999 Fifth Edition 2001 Reprinted 2002, 2003, 2004, 2005, 2006 Sixth Edition 2007 Reprinted 2007, 2008, 2009, 2010, 2011, 2012 Seventh Edition 2013 Reprinted 2013, 2014, 2015, 2016, 2017, 2018, 2019 Eighth Edition 2020 Reprinted 2020

ISBN 978 981 32 4539 6

ACKNOWLEDGEMENTS

All licensed images purchased under standard license agreement with www.shutterstock.com While every effort has been made to trace the copyright holders and obtain permission for material reproduced in this book, if there has been an oversight, the Publisher will be grateful to hear from anyone who has not been appropriately acknowledged and to make the corrections in future reprints or editions of this book.