Knoop, Todd A.
Blackwell Pub., 2008
Buku Teks SO
edited by Tom Ginsburg, Mark D. Rosen and Georg Vanberg
Cambridge University Press, 2019
eBooks
Schiff, Peter D.
John Wiley & Sons, 2010
Buku Teks
Pigou, Arthur Cecil, 1877-1959
Macmilan and Co., 1929
Buku Teks
Roose, Kenneth D.
Yale University Press, 1954
Buku Teks