Brown, G. I. <br/><br/>
Panduan baharu teori valensi modern / 
G. I. Brown 
 - 3rd ed. 
 - Pulau Pinang :  Penerbit Universiti Sains Malaysia,  1978 
 - 272 p. :  ill. ;  22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Valence (Theoretical chemistry)<br/>Chemistry, Physical and theoretical