From the 10 (Santa Monica) Freeway:

Exit Cloverfield/26^th Street
Take 26^th Street North to Wilshire Boulevard 
Turn right onto Wilshire 
To 1 block; turn right onto Princeton 
Entrance to parking is on the left side 

From the 405 (San Diego) Freeway:

Take the Wilshire West exit 
Follow Wilshire Boulevard approximately 1.5 miles to Princeton
Turn left onto Princeton 
Entrance to parking is on the left side