Não informado. (1959). World agricultural economics and rural sociology abstracts. Commonwealth Agricultural Bureau.
Chicago-viite (17. p.)Não informado. World Agricultural Economics and Rural Sociology Abstracts. Farnham Royal, Inglaterra: Commonwealth Agricultural Bureau, 1959.
MLA-viite (8. p.)Não informado. World Agricultural Economics and Rural Sociology Abstracts. Commonwealth Agricultural Bureau, 1959.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.