What is the best mode for recruiting middle level employees, A) News paper advertisement B) Job portals C) Employee reference D) Recruitment agencies?

The second option "Job portals" can be the best, you can find throgh it candidates for any job you may need.

C) Employee reference

Option "B" will be good.
Where you can find the candidates as you want.
I mean you can identify as per the required skills.

Job Portals and Employee refernce

In all levels the #1 is referrals is the best .
middle Level , after the referrals would be the job portals , LinkedIn.
Recruitment Agencies, would be expensive specially that it would be easy to find

A.I agree with option A.Through news papers one can get good talented middle level employees.Because it gives the employer a chance to interview directly the prospective candidates without undue influence of middle men.

D

Depends on position an d Availability  of the specific talent supply vs demand

Job Portals.

B. Job Portals are more convenient and an effiecient way.

 

B , i agree.