De Yro, T. B. (1976). Problems of industrial arts instruction in the Division of Cagayan I [microform]. Photoduplication Service. University of the Philippines Library.
Citazione stile Chigago Style (17a edizione)De Yro, Tomas Baluyan. Problems of Industrial Arts Instruction in the Division of Cagayan I [microform]. Quezon City: Photoduplication Service. University of the Philippines Library, 1976.
Citatione MLA (9a ed.)De Yro, Tomas Baluyan. Problems of Industrial Arts Instruction in the Division of Cagayan I [microform]. Photoduplication Service. University of the Philippines Library, 1976.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.