Ceylon. Dept. of Industries. (1951). Administration report of the Acting Director of Industries for the years.
Chicago-viite (17. p.)Ceylon. Dept. of Industries. Administration Report of the Acting Director of Industries for the Years. Colombo, 1951.
MLA-viite (8. p.)Ceylon. Dept. of Industries. Administration Report of the Acting Director of Industries for the Years. 1951.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.