editor, Giorgio Berlot
Springer, 2012
eBooks
Roberts, Sharon L., author
Appleton Century Crofts, 1986
Buku Teks
Roberts, Sharon L., author
Prentice-Hall, 1985
Buku Teks
edited by Edward D. Sivak, Thomas L. Higgins, Adam Seiver
William & Wilkins, 1995
Buku Referensi
Robertson, John A., author
Bantam Books, 1983
Buku Teks