[Tex/LaTex] Classicthesis citation style (author,year instead of numerical)

citingclassicthesisnatbib

I'm using classicthesis 4.1 in LyX to write my thesis and I need help with natbib's citation style.

I can't seem to change the natbib numerical citation style to (Author et al., XXXX; Author2 et al., YYYY).

I have this current line, however, I cant find the right place to put it to make it work:

\usepackage[authoryear,round,colon]{natbib}

Present situation:

present

Desired result:

goal

PS. I am aware that the classicthesis manual states:

Citation format is governed by the natbib numerical style invoked in
the document settings of the main thesis file (beware, options
chosen in classicthesis-config.tex will have no effect).

Best Answer

This seems to do what you want:

\begin{filecontents*}{abcdefg.bib}
@ARTICLE{sievers07,
   author = {{Sievers}, J.~L. and {Achermann}, C. and {Bond}, J.~R. and {Bronfman}, L. and
    {Bustos}, R. and {Contaldi}, C.~R. and {Dickinson}, C. and {Ferreira}, P.~G. and
    {Jones}, M.~E. and {Lewis}, A.~M. and {Mason}, B.~S. and {May}, J. and
    {Myers}, S.~T. and {Oyarce}, N. and {Padin}, S. and {Pearson}, T.~J. and
    {Pospieszalski}, M. and {Readhead}, A.~C.~S. and {Reeves}, R. and
    {Taylor}, A.~C. and {Torres}, S.},
    title = "{Implications of the Cosmic Background Imager Polarization Data}",
     journal   = "Astrophys. J.",
     year = "2007",
    pages = {976-987},
}

@book{goossens93,
    author = "Michel Goossens",
    title = "The {LaTeX} Companion",
    year = "1993",
    publisher = "Addison-Wesley",
    address = "Reading, Massachusetts"
}
\end{filecontents*}
\documentclass{scrbook}
\usepackage[T1]{fontenc}
\usepackage{classicthesis}

\usepackage[authoryear,round,colon]{natbib}
\hypersetup{colorlinks=true,citecolor=cyan}% just for the example

\begin{document}

\citep{sievers07,goossens93}
\bibliographystyle{plainnat}
\bibliography{abcdefg}

\end{document}

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