The phrase "brief quotations" means that you are allowed to use a small part of someone else's work, such as a book or article, without asking for permission. Full definition
No part of this book may be reproduced or transmitted, in any form, or by any means, electronic or mechanical, without the written permission from the publisher; except in the case of brief quotations embodied in the critical articles and reviews. (healingedge.net)
Compile a list of brief quotations from other sources along with page references which will be presented as your evidence. (custom-paper-writing.com)
No part of this publication — including the drawings, graphs, illustrations, or chapters, except for brief quotations in critical reviews or articles — may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission from ASCD. (ascd.org)