De Smith, S.A. (Stanley A.)
Stevens & Sons Limited, 1980
Buku Teks
Sitorus, Lily Evelina
Faculty of Law University of Indonesia, 2016
Artikel Jurnal
edited by B.C. Lemke, James Don Edwards
Charles E. Merrill, 1961
Buku Teks
Britt, Steuart Henderson
McGraw-Hill , 1968
Buku Teks
Britt, Steuart Henderson
McGraw-Hill Kogakusha, 1978
Buku Teks