Hibbs, J. W., & Whittlestone, W. Understanding dairy production in developing countries. Volunteers in Technical Assistance.
Chicago-viite (17. p.)Hibbs, John W., ja W.G Whittlestone. Understanding Dairy Production in Developing Countries. Arlington, Virginia: Volunteers in Technical Assistance.
MLA-viite (9. p.)Hibbs, John W., ja W.G Whittlestone. Understanding Dairy Production in Developing Countries. Volunteers in Technical Assistance.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.