Pindyck, R, S., Rubinfeld, D, R. (2018). Microeconomics 9th ed (9th ed). Harlow, UK: Pearson Education, c.
Pindyck, Robert, S.., Rubinfeld, Daniel, R.. "Microeconomics 9th ed". 9th ed Harlow, UK: Pearson Education, c, 2018. Buku Wajib.