Using Oracle, how do I insert a text field with an embedded ';' value.?

I have a table with several text fields. I am trying to insert text in one of those fields that includes new lines and a semicolon ';'. SQLPLUS interprets the the semicolon as the end of the command, and reports an error: SQL> insert into mytable values (' field; ', 'field2'); ORA-01756: quoted string not properly terminated. Escaping with field'';'' eliminates the error, but leaves the value as "field';'", which is not what I want. Escaping with '\' does not help. How do I escape a semicolon at the end of a line of multiline text input?