Hutagalung, Arie Sukanti, supervisor
The Law Of The Contract In Indonesia Practical Issues In Drafting Business Cntracts
Faculty Of Law University, 1993
 Buku Teks
Arie Sukanti Sumantri
The law of contract in Indonesia practical issues in drafting business contracts
Universitas Indonesia, 1993
 Buku Teks
Stone, Richard
Principles of Contract Law
Cavendish Publishing Limited, 2000
 Buku Teks
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
 Buku Teks