Avoid being vague If you have references include them. Dont say available upon request. If you have gaps in employment explain them clearly. They will probably come up in the interview anyways. Being prepared in advance by giving complete information in your resume is better than being caught off guard in the interview or worse skipped over all together.
Functional Sample When you are referring the online resume samples, you will need a functional sample if you have employment gaps in your past. Functional format does not draw attention towards the gaps in employment history of the applicant. Rather it focuses on the existing skills of the applicant. It will explain to the employer about how these skills can help to benefit the company.
The template of the resume which is actually the outline or the structure of the resume decides the positioning of every element of the resume. If this positioning is clear and clean with an equal weightage given to every element it appears that there is a flow in the format and so the resume appears attractive. Such a resume neither looks like a piece of art which shows that you were keen about the outline of the resume rather than the content nor does it appear as an essay.