9th – 12th Grades – Krugman’s ECONOMICS for AP – 2nd Edition (2015, Worth)

9th – 12th Grades – Krugman’s ECONOMICS for AP. 2nd Edition AP Practice Exams. Publishers: Worth Publishers. AP PRACTICE EXAMS. Section 13 FACTOR MARKETS. Modules 64 – 68. Section 12 MARKET STRUCTURES: IMPERFECT COMPETITION.