edited by Johan Roos
Prentice-Hall, 1994
Buku Teks
edited by Stephen E. Finn, Constance T. Fischer, and Leonard Handler
John Wiley & Sons, 2012
Buku Teks
Veech, Annette M., author
Prentice-Hall, 2002
Buku Teks
Towle, Joseph W., author
Houghton Miffiln, 1965
Buku Teks
edited by Edward H. Spicer
Russell Sage Foundation, 1952
Buku Teks