Bellows, R. M. (1962). Executive skills; their dynamics and development / R. Bellows, Thomas Q. Gilson [and] George S. Odiorne. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Bellows, Roger Marion. Executive Skills; Their Dynamics and Development / R. Bellows, Thomas Q. Gilson [and] George S. Odiorne. Englewood Cliffs, N. J: Prentice-Hall, 1962.
Lua MLA (9ú heag.)Bellows, Roger Marion. Executive Skills; Their Dynamics and Development / R. Bellows, Thomas Q. Gilson [and] George S. Odiorne. Prentice-Hall, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.