Hartzler, F. E., <br/><br/>
Pedoman praktis :  pramuniaga toko / 
F.E. Hartzler Rusli Hakim. 
 - Jakarta :  Bhratara,  1973. 
 - 163 pages ;  22cm. 
<br/><br/> Judul asli: Retail salesmanship a programmed text 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Selling--Programmed instruction.<br/>Clerks (retail trade)--Programmed instruction.