dear sirs，
having seen your advertisement in xx evening news of august 6th for a salesman in the electronic device department of your company, i’m very interested in the job and i feel i’m qualified to meet the requirements. therefore, i’m enclosing a resume together with a reference from my supervisor.
as you can see, i once worked in the electronic department. so i am familiar with different kinds of electronic devices. i have worked more than once as a salesman in some stores during my previous vacations. besides, i’m very patient and friendly in nature. i’m confident that i shall be suitable for the kind of work.
if you need any further information, i shall be very pleased to supply it. (i’ll be very grateful if you can grant me with an interview.) looking forward to hearing from you soon.
yours faithfully,