One resume example is the combination resume format, which makes use of the other 2 main resume formats. It's also known as the hybrid resume format or chrono-functional resume formats.
Why the combination resume shown here? Because sometimes neither the functional or the chronological resume format is quite right for your situation.
When you have had a clear job progression over a number of years and you're searching for a job in the same vein as what you're doing now, a chronological resume will probably work quite well.
But if you're new to the job market, changing careers, or have had gaps in your work history, a functional resume might work better. (See Choosing a Resume Format for more information)
But then again, you could use a combination of both formats where skills that are relevant to the current job search are placed in a special section by function, while the Professional History or Work Experience is presented in a standard, reverse-chronological format. This format offers the best of both worlds, and is highly popular with both modern job seekers and hiring managers.