@book { LearningAsAFunctionofDifficultyValuesoftheLearningMaterialLearningToBe,
    title = "Learning As A Function of Difficulty Values of the Learning Material: Learning To Be",
    author = "Najmah {Peerzada}",
    year = "2014",
    publisher = "Anchor Academic Publishing",
    address = "Hamburg, Germany",
    url = "https://m.anchor-publishing.com/document/312732"
}