Mellby, E. M. (1979). The effects of adult and continuing education on annual income, socioeconomic status, job satisfaction and locus of control of adult males. University of Arizona.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Mellby, Erik Mark. The Effects of Adult and Continuing Education on Annual Income, Socioeconomic Status, Job Satisfaction and Locus of Control of Adult Males. Tucson, Arizona: University of Arizona, 1979.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Mellby, Erik Mark. The Effects of Adult and Continuing Education on Annual Income, Socioeconomic Status, Job Satisfaction and Locus of Control of Adult Males. University of Arizona, 1979.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.