@inbook{inbook, title  = {{Cross-Sectional and Longitudinal Studies.}},

 publisher = {{Oxford University Press.}},

 url = {{}},

 year = {{2020}},

 month = {{1}},

 author = {{Bell AJ}},

 isbn = {{9780198850298}},

 pages = {{72-75}},

 note = {{Accessed on 2024/09/19}}}