Outer joins

Hello,

is there a possibility to use "outer joins" (left outer join) with pgsql?
I have a problem joining two tables:

TablePerson                        TableTitle
-----------                        ----------
pk_idperson    int primary key            pk_idtitle        int primary key
name        varchar(20)                title            varchar(10)
firstname    varchar(20)
fk_idtitle    int

INSERT INTO TableTitle VALUES (1,'Dr.');
INSERT INTO TableTitle VALUES (2,'Prof.');

INSERT INTO TablePerson VALUES (1,'Kohl','Helmut',1);
INSERT INTO TablePerson VALUES (2,'Steubesand','Thomas',NULL);
INSERT INTO TablePerson VALUES (3,'Smith','Peter',2);

SELECT name,firstname,title
  FROM TablePerson,TableTitle
  WHERE TablePerson.fk_idtitle = TableTitle.pk_idtitle;

results:    Kohl        Helmut    Dr.
        Smith     Peter        Prof.

How can I force pgsql to return the following result:
        Kohl        Helmut    Dr.
        Steubesand    Thomas
        Smith     Peter        Prof.

Thank you

Thomas Steubesand
(T.Steubesand@fh-trier.de)