The ACS style guide:   

 - Washington, DC   American Chemical Society,  1986 
 - xvii, 264 p. : 
<br/><br/><label>ISBN: </label>0841209170 :;ISBN084120943X (pbk.) : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry; English language; Technical writing
<br/><br/><label>LC Class. No.: </label>QD8.5  / .A25 1986