«Shugart Associates advertisement». Computerworld [Newton MA], 30-05-1973, pàg. 6. Arxivat de l'original el 28 de setembre 2024 [Consulta: 16 d’octubre 2021]. «Shugart Associates was formed in February 1973 ...»
«Shugart President Resigns». Computerworld [Newton MA], 30-10-1974, pàg. 42. Arxivat de l'original el 28 de setembre 2024 [Consulta: 16 d’octubre 2021]. «Shugart Associates' founder, Alan F. Shugart, has resigned as president. He was replaced by Donald J. Massaro, former vice-president of operations.»
«Shugart Associates advertisement». Computerworld [Newton MA], 30-05-1973, pàg. 6. Arxivat de l'original el 28 de setembre 2024 [Consulta: 16 d’octubre 2021]. «Shugart Associates was formed in February 1973 ...»
«Shugart President Resigns». Computerworld [Newton MA], 30-10-1974, pàg. 42. Arxivat de l'original el 28 de setembre 2024 [Consulta: 16 d’octubre 2021]. «Shugart Associates' founder, Alan F. Shugart, has resigned as president. He was replaced by Donald J. Massaro, former vice-president of operations.»