Cita APA (7a ed.)
O'Day, E. F. Programmed Instruction and How to Use It in Educational Applications. Prentice-Hall.
Cita estilo Chicago (17a ed.)
O'Day, Edward F. Programmed Instruction and How to Use It in Educational Applications. Englewood Cliffs, EUA: Prentice-Hall.
Cita MLA (9a ed.)
O'Day, Edward F. Programmed Instruction and How to Use It in Educational Applications. Prentice-Hall.
Precaución: Estas citas no son 100% exactas.