Niguidula, B. N. (1977). Study of the factors of production of Philippine newspapers and some foreign newspapers [microform]. Photoduplication Service. University of the Philippines Library.
Citace podle Chicago (17th ed.)Niguidula, Bernardo N. Study of the Factors of Production of Philippine Newspapers and Some Foreign Newspapers [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1977.
Citace podle MLA (9th ed.)Niguidula, Bernardo N. Study of the Factors of Production of Philippine Newspapers and Some Foreign Newspapers [microform]. Photoduplication Service. University of the Philippines Library, 1977.
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