STUDY GUIDE PRINCIPLES OF MACROECONOMICS
JOHN VAHALY1983 年出版194 页ISBN:0673158543
BASIC REFERENCE SOURCES A SELF STUDY MANUAL THIRD EDITION
MARGARET T.TAYLOR AND RONALD R.POWELL1985 年出版335 页ISBN:0810817217
LANGUAGE AWARENESS IN THE CLASSROOM
CARL JAMES AND PETER GARRETT1991 年出版178 页ISBN: