Murray Longmore [and others]
Oxford University press, 2014
Buku Teks
edited by Rachel Weber and Randall Crane
Oxford University Press, 2012
Buku Teks
edited by Mike Wright, Donald S. Siegel, Kevin Keasey and Igor Filatotchev
Oxford University Press, 2014
Buku Referensi
edited by Julia Smedley, Finlay Dick and Steven Sadhra
Oxford University Press, 2013
Buku Teks
edited by Stephen Ackroyd, Rosemary Batt, Paul Thompson and Pamela S. Tolbert
Oxford University Press, 2006
Buku Referensi