University of the Philippines System. Office of Research Coordination, UP Education Research Program, & Guzman, M. K. (1998). Living language: Assessment of language proficiency and needs in the professions and in the workplace. Office of Research Coordination Education Research Program-CIDS, University of the Philippines.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)University of the Philippines System. Office of Research Coordination, UP Education Research Program, و Maybelle K. Guzman. Living Language: Assessment of Language Proficiency and Needs in the Professions and in the Workplace. Diliman, Quezon City: Office of Research Coordination Education Research Program-CIDS, University of the Philippines, 1998.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)University of the Philippines System. Office of Research Coordination, et al. Living Language: Assessment of Language Proficiency and Needs in the Professions and in the Workplace. Office of Research Coordination Education Research Program-CIDS, University of the Philippines, 1998.