Não informado. (1958). Permanent Way. Japan Railway Civil Engineering.
Chicago-viite (17. p.)Não informado. Permanent Way. Tokyo: Japan Railway Civil Engineering, 1958.
MLA-viite (8. p.)Não informado. Permanent Way. Japan Railway Civil Engineering, 1958.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.