Anson, William R., Sir
Principles of the english law of contract and of agency in its relation to contract
Clarendon Press, 1947
 Buku Teks
Anson, William R., Sir
Principles of the law of contract : with a chapter on the law of agency
Oxford University Press, 1930
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Wilson, J. F.
Principles of the law of contract
Sweet & Maxwell, 1957
 Buku Teks
Alsagoff, Syed Ahmad
Principles of the Law of Contract in Malaysia
LexisNexis, 2010
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Stone, Richard
Principles of Contract Law
Cavendish, 2000
 Buku Teks