@book { OptimisticandPessimisticAdolescence,
    title = "Optimistic and Pessimistic Adolescence",
    subtitle = "A comparison of Physical Fitness and Physiological variables",
    author = "D. Jim Reeves {Silent Night} and C. {Esakkiappan}",
    year = "2015",
    publisher = "Anchor Academic Publishing",
    address = "Hamburg, Germany",
    url = "https://m.anchor-publishing.com/document/301779"
}