Bertolotto, Michele, editor
Springer, 2012
eBooks
Novak, Edmund R., author
W.B. Saunders, 1965
Buku Teks
Crowley, Leonard V., 1926-, author
Jones and Bartlett, 2004
Buku Teks
Dwight Fee
Sage, 2000
Buku Teks
Novak, Edmund R., author
W.B. Saunders , 1979
Buku Teks