Every journal publishes reference guidelines and recommended style guides.  Formatting and referencing should follow the standards of the journal you're submitting to.  Different fields of study have different standards of what constitutes a high-quality paper, depending on the maturity of the field and the rigor its subject material allows, but generally, a good paper articulates a point and then shows something about its truth:  It may show that the point is definitely true or definitely false (eg, as a result of definitions or theorems already accepted), or definitely supported, unsupported, or contradicted by available evidence (eg, as a result of evidence provided by meticulously documented repeatable experiments).  

Showing that the statement is "unsupported" is considered an important result only if previous papers have mistakenly assumed or concluded that it is "supported" or "contradicted" according to the evidence.  In this case you must show how and why the original evidence was erroneous or misinterpreted.

The most common flaws that get papers rejected are: 
   Experiments described without enough information that someone else can repeat them and get the same results.
   Flawed statistical calculations or procedures, sample sizes insufficient to demonstrate statistical points, and math errors.
   Facts or principles from previous work stated without attribution or sources.  
   Unfamiliarity with previous work, ie, the researcher fails to apply well-known and relevant knowledge from their field.
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