FOCUS ON PSYCHOLOGY:A GUIDE TO MASTERING PETER GRAY'S PSYCHOLOGY SECOND EDITION
MARY TRAHAN1994 年出版299 页ISBN:0879016957
American Government and Politics Today:THE ESSENTIALS 2002-2003 edition
2222 年出版591 页ISBN:0534586538
ECONOMICS:PRINCIPLES AND PRACTICES READING ESSENTIALS AND STUDY GUIDE
2222 年出版228 页ISBN:0078224551