Dòng Nội dung
1
Research methods in economics & business / Robert Ferber, P J Verdoorn.
New York : Macmillan, 1962.
573 p. ; 25 cm.
2
The economist’s handbook : a research and writing guide / Thomas L. Wyrick.
Minneapolis/St. Paul : West, 1994
1 v. (various pagings) ; 26 cm.