The work is presented here without copyright, although acknowledgement is (of course) appreciated.
It is important to properly and appropriately cite references in scientific research papers in order to acknowledge your sources and give credit where credit is due.
Although many personal statements will not include any citation of sources, in some cases—particularly if your work is in the sciences and you need to provide a brief literature review—you will need to cite sources at the end of your essay in a “References” section.
Chapter 1 discusses the ethical concerns associated with source citation as you write personal essays (see "Student Writing and Ethics" section).
Harnack & Kleppinger (2000) have adapted "CBE style" to cite and document online sources.
You should acknowledge a source any time (and every time) you use a fact or an idea that you obtained from that source.
Science moves forward only by building upon the work of others.
There are, however, other reasons for citing references in scientific research papers.
You may wish to include citations for sources that add relevant information to your own work, or that present alternate views.
The reference citation style described here is a version of the "Author, Date" scientific style, adapted from Hansen (1991) and the Council of Biology Editors (1994).