CSE is the citation style of the Council of Science Editors, and it is commonly used for scientific writing. CSE allows three different systems for in text citation style and ordering your reference list; you must pick one and be consistent, unless you're submitting to a journal that uses this; in which case of course use the version they want.
As many short CSE style guides do, ours will feature below some details of name-date system regarding in-text citations, since that is the most complicated version among the three.