UNDERSTANDING ECONOMICS TODAY SIXTH EDITION
GARY M.WALTON AND FRANK C.WYKOFF1998 年出版496 页ISBN：
UNDERSTANDING INTERNATIONAL ECONOMICS THEORY AND PRACTICE
1980 年出版506 页ISBN：0316744298
ECONOMIC METHODOLOGY UNDERSTANDING ECONOMICS AS A SCIENCE
2010 年出版209 页ISBN：9780230218123
TEACHER＇S GUIDE TO ACCOMPANY UNDERSTANDING ECONOMICS
DR.ALLEN W.SMITH1986 年出版154 页ISBN：0676398960
UNDERSTANDING CLASSICAL ECONOMICS:STUDIES IN LONG PERIOD THEORY
1998 年出版283 页ISBN：0415158710
