Summarise the ways an employer can find workers using the given text as a reference

Context: The main ways for employers to find workers and for people to find employers are via jobs listings in newspapers and online, also called job boards. Employers and job seekers also often find each other via professional recruitment consultants which receive a commission from the employer to find, screen and select suitable candidates. However, a study has shown that such consultants may not be reliable when they fail to use established principles in selecting employees. A more traditional approach is with a "Help Wanted" sign in the establishment. Evaluating different employees can be quite laborious but setting up different techniques to analyze their skills to measure their talents within the field can be best through assessments. Employer and potential employee commonly take the additional step of getting to know each other through the process of a job interview.

Answer: 1. Job listing in newspapers through classified advertising.
2. Posting Job listings online (Job Boards) .
3. Through Recruitment consultants who takes a commission from the employer to find, screen and select suitable candidates. 
4. By displaying a 'Help Wanted' sign in the establishment  near a window or door or on the reception.