Não informado. (1971). Journal of Agricultural Research. Government of the Punjab, Department of Agriculture.
Chicago-viite (17. p.)Não informado. Journal of Agricultural Research. Lahore, Paquistao: Government of the Punjab, Department of Agriculture, 1971.
MLA-viite (8. p.)Não informado. Journal of Agricultural Research. Government of the Punjab, Department of Agriculture, 1971.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.