De Yro, T. B. (1976). Problems of industrial arts instruction in the Division of Cagayan I [microform]. Photoduplication Service. University of the Philippines Library.
Chicago-viite (17. p.)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.
MLA-viite (9. p.)De Yro, Tomas Baluyan. Problems of Industrial Arts Instruction in the Division of Cagayan I [microform]. Photoduplication Service. University of the Philippines Library, 1976.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.