Valdez, V. B. (1980). Factors of indluencing the survival or discontinuance of community newspapers in the Southern Tagalog Region: An exploratory study [microform]. Photoduplication Service. University of the Philippines Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Valdez, Violet B. Factors of Indluencing the Survival or Discontinuance of Community Newspapers in the Southern Tagalog Region: An Exploratory Study [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1980.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Valdez, Violet B. Factors of Indluencing the Survival or Discontinuance of Community Newspapers in the Southern Tagalog Region: An Exploratory Study [microform]. Photoduplication Service. University of the Philippines Library, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.