Thomas, M. L. (1995). The concept of portfolio management as an instrument of strategic planning: An examination of different methods and models with focus on the applicability to the commercial airline industry (an exploratory investigative study on services management).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Thomas, Mike L. The Concept of Portfolio Management as an Instrument of Strategic Planning: An Examination of Different Methods and Models with Focus on the Applicability to the Commercial Airline Industry (an Exploratory Investigative Study on Services Management). 1995.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Thomas, Mike L. The Concept of Portfolio Management as an Instrument of Strategic Planning: An Examination of Different Methods and Models with Focus on the Applicability to the Commercial Airline Industry (an Exploratory Investigative Study on Services Management). 1995.