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(dot)Steubesand(at)fh-trier(dot)de)