Keeping, E.S., author
Van Nostrand Reinhold, 1962
Buku Teks
Dobson, Annette, author
Chapman and Hall, 1983
Buku Teks
Stoodley, K.D.C., author
John Wiley & Sons, 1980
Buku Teks
Stigler, Stephen M., author
Harvard University Press, 2019
Buku Teks
Ott, Lyman, author
Duxbury Press, 1993
Buku Teks