Pennsylvania State University. Office of the Vice President for Research and Graduate Studies, Pennsylvania State University. Office of the Vice President for Research and Dean of the Graduate School, & Pennsylvania State University. Office of the Senior Vice President for Research and Dean of the Graduate School. (1980). Research. Pennsylvania State University, Office of the Vice President for Research and Graduate Studies.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Pennsylvania State University. Office of the Vice President for Research and Graduate Studies, Pennsylvania State University. Office of the Vice President for Research and Dean of the Graduate School, و Pennsylvania State University. Office of the Senior Vice President for Research and Dean of the Graduate School. Research. University Park, Pa: Pennsylvania State University, Office of the Vice President for Research and Graduate Studies, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Pennsylvania State University. Office of the Vice President for Research and Graduate Studies, et al. Research. Pennsylvania State University, Office of the Vice President for Research and Graduate Studies, 1980.