Cita APA

Engelmann, S. (1980). Direct instruction. Educational Technology Publications.

Citación estilo Chicago

Engelmann, Siegfried. Direct Instruction. Englewood Cliffs, N.J: Educational Technology Publications, 1980.

Cita MLA

Engelmann, Siegfried. Direct Instruction. Educational Technology Publications, 1980.

Warning: These citations may not always be 100% accurate.