Riches, Sarah. Keenan and Riches' business law / Business law Sarah Riches and Vida Allen. - 9th ed. - Harlow, England ; New York : Pearson Longman, 2011. - xliii, 582 p. : ill.; 25 cm. Includes index. ISBN: 978140589964 (pbk.) Subjects--Topical Terms: Commercial law--England.Commercial law--Wales.