@book { AgriculturalPolicyandSoilFertilityManagementintheMaizebasedSmallholderFarmingSysteminMalawi,
    title = "Agricultural Policy and Soil Fertility Management in the Maize-based Smallholder Farming System in Malawi",
    author = "Hardwick {Tchale}",
    year = "2006",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101042"
}