Ryan, Michael, 1951-
Wiley-Blackwell, 2017
Buku Teks
edited by Julie Rivkin and Michael Ryan
John Wiley & Sons, 2017
Buku Teks
Cambridge University Press, 1978
eBooks
Juhl, P.D.
Princeton University Press, 1980
Buku Teks
Ayers, David
Blackwell Publishing, 2008
Buku Teks