Ahn, S. (1999). Technology upgrading with learning cost. A solution for two "productivity puzzles" ([1st ed.].). OECD.
Chicago Style (17th ed.) CitationAhn, Sanghoon. Technology Upgrading with Learning Cost. A Solution for Two "Productivity Puzzles". [1st ed.]. Paris: OECD, 1999.
MLA (9th ed.) CitationAhn, Sanghoon. Technology Upgrading with Learning Cost. A Solution for Two "Productivity Puzzles". [1st ed.]. OECD, 1999.
Warning: These citations may not always be 100% accurate.