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@book{Veblen2005:1899,
    Author = {Veblen, Thorstein},
    Isbn = {9788187879299},
    Language = {en},
    Month = jan,
    Publisher = {Aakar Books},
    Title = {{The Theory of the Leisure Class; An Economic Study of Institutions}},
    Year = {[1899] 2005}}

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noindent
ldots citep{Veblen2005:1899} stated that ldots\

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@book{Veblen2005:1899,
    author = {Veblen, Thorstein},
    Isbn = {978-81-87879-29-9},
    publisher = {Aakar Books},
    title = {The Theory of the Leisure Class},
    subtitle = {An Economic Study of Institutions},
    date = {2005-01},
    origyear = {1899}}

@book{Weber2013,
    Author = {Weber, Max},
    Isbn = {9781135973988},
    Keywords = {Reference / General, Religion / General},
    Language = {en},
    Month = jul,
    Publisher = {Routledge},
    Title = {{The Protestant Ethic and the Spirit of Capitalism}},
    Year = {2013},
       origdate = {1905}}
end{filecontents*}

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% arara: biber
% arara: pdflatex
begin{document}
ldots citep{Veblen2005:1899} stated that ldots\

However citet{Weber2013} demonstrates that ldots

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end{document}

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documentclass{article}
usepackage[backend=biber, style=authoryear, natbib=true]{biblatex}
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@book{Veblen2005:1899,
    author = {Veblen, Thorstein},
    Isbn = {978-81-87879-29-9},
    publisher = {Aakar Books},
    title = {The Theory of the Leisure Class},
    subtitle = {An Economic Study of Institutions},
    date = {2005-01},
    origyear = {1899},
}
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begin{document}
ldots citep{Veblen2005:1899,wilde} stated that ldots

printbibliography
end{document}