+ wishlist Principles of External Auditing [9780470974452] Add to Cart The item has been added Author: Brenda Porter Jon Simon David Hatherly Principles of External Auditing [9780470974452] Buy More - Save More. Below are the available bulk discount rates for each individual item when you purchase a certain amount Quantity Price Savings 25 - 49 4% 50 - 99 5% 100+ 6% List Price As Low as $83.95 Format: Paperback