Boston, R. E. (1972). How to write and use performance objectives to individualized instruction: Volume 3; how to classify a performance objective. Educational Technology.
Lua i Stíl Chicago (17ú heag.)Boston, Robert E. How to Write and Use Performance Objectives to Individualized Instruction: Volume 3; How to Classify a Performance Objective. Englewood Cliffs, NJ: Educational Technology, 1972.
Lua MLA (9ú heag.)Boston, Robert E. How to Write and Use Performance Objectives to Individualized Instruction: Volume 3; How to Classify a Performance Objective. Educational Technology, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.