Fahrner, W. F. (1965). Basic rules of alphabetic filing Programmed instruction. SouthWestern.
Citazione stile Chigago Style (17a edizione)Fahrner, William F. Basic Rules of Alphabetic Filing Programmed Instruction. SouthWestern, 1965.
Citatione MLA (9a ed.)Fahrner, William F. Basic Rules of Alphabetic Filing Programmed Instruction. SouthWestern, 1965.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.