Bellows, R. M. (1962). Executive skills; their dynamics and development / R. Bellows, Thomas Q. Gilson [and] George S. Odiorne. Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBellows, Roger Marion. Executive Skills; Their Dynamics and Development / R. Bellows, Thomas Q. Gilson [and] George S. Odiorne. Englewood Cliffs, N. J: Prentice-Hall, 1962.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBellows, Roger Marion. Executive Skills; Their Dynamics and Development / R. Bellows, Thomas Q. Gilson [and] George S. Odiorne. Prentice-Hall, 1962.
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