Wilson, J. F.
Principles of the law of contract
Sweet & Maxwell, 1957
 Buku Teks
Anson, William R., Sir
Principles of the english law of contract and of agency in its relation to contract
Clarendon Press, 1947
 Buku Teks
Brooks, Brian S.
Contract of employment principles of Australian employ-ment Law
Tax and Business Law Publishers, 1990
 Buku Teks
Burton, Steven J., editor
Principles of contract law/ Steven J. Burton
West Publishing Co., 1995
 Buku Teks
Murdoch, John
Construction contract law and management
Spon Press, 2000
 Buku Teks