APA Style does involve strict rules for referencing sources, but it is about more than just citation. APA Style also includes guidelines about how to write, addressing elements such as point of view, bias, voice, grammar and punctuation.
In general, you should try to use active voice, be as concise as possible, avoid overly poetic or flowery language, and avoid bias. The following links provide details and examples of these guidelines.
Publication Manual of the American Psychological Association by 
