Research Institute of Telecommunications and Economics. Research report summaries '71. Tokyo: Research Institute of Telecommunications and Economics.
Chicago-tyylinen lähdeviittausResearch Institute of Telecommunications and Economics. Research Report Summaries '71. Tokyo: Research Institute of Telecommunications and Economics.
MLA-viiteResearch Institute of Telecommunications and Economics. Research Report Summaries '71. Tokyo: Research Institute of Telecommunications and Economics.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.