> Blockquote
Voici une solution, si j'ai bien compris ce que vous souhaitez : il suffit d'utiliser le style par défaut (`numeric`) pour la bibliographie, le style `authortitle` pour les citations, et la commande `\footcite` :
\documentclass[french]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{geometry}
\usepackage{fourier, erewhon}
\usepackage[scaled =0.92]{cabin}
\usepackage{babel}
\usepackage[autostyle]{csquotes}% recommended in output (biblatex)
\usepackage[backend=biber, autolang=other, citestyle=authortitle, sortcites, autostyle=footnote]{biblatex}
\setcounter{biburllcpenalty}{7000}
\setcounter{biburlucpenalty}{8000}
\def\UrlFont{\sffamily}
\let\cite\autocite
\DeclareNameFormat{labelname}{%
\ifcase\value{uniquename}%
\usebibmacro{name:given-family}
{\namepartfamily}
{\namepartgiven}
{\namepartprefix}
{\namepartsuffix}%
\or
\ifuseprefix
{\usebibmacro{name:given-family}
{\namepartfamily}
{\namepartgiveni}
{\namepartprefix}
{\namepartsuffixi}}
{\usebibmacro{name:given-family}
{\namepartfamily}
{\namepartgiveni}
{\namepartprefixi}
{\namepartsuffixi}}%
\or
\usebibmacro{name:family}
{\namepartfamily}
{\namepartgiven}
{\namepartprefix}
{\namepartsuffix}%
\fi
\usebibmacro{name:andothers}}
\usepackage{filecontents}
\begin{filecontents}{mabiblio.bib}
@BOOK{Dodgson,
AUTHOR = {Lewis Carroll},
TITLE = {The Hunting of the Snark},
YEAR = {1876},
PUBLISHER = {Macmillan},
LOCATION = {London}
}
@BOOK{Lear,
AUTHOR = {Edward Lear},
TITLE = {Les Sept familles du lac Pipple-Popple},
TITLEADDON = {(The History of the seven families of the lake Pipple-Popple)},
TRANSLATOR = {Simone Lamblin},
PUBLISHER = {Gallimard},
LOCATION = {Paris},
YEAR = {1978},
EDITION = {2},
}
@online{nonsense,
title = {International Owl \& Pussycat Day, 12 May},
year = 2011,
url = {https://teachingnonsenseinschools.wordpress.com},
urldate = {2010-09-30}
}
\end{filecontents}
\addbibresource{mabiblio.bib}
\begin{document}
\nocite{*}
\vspace*{12cm}
Deux ouvrages indispensables\footcite{Lear, Dodgson}:
\printbibliography%
\end{document}
![alt text][1]
[1]: http://texnique.fr:80/osqa/upfiles/authortitlewlabel_LIUtFx6.png
