\documentclass[english,ngerman]{article}

\usepackage[T1]{fontenc}

\usepackage{csquotes}

\usepackage{babel}

\begin{document}

This is a quote:
\begin{quote}
Quote quote quote quote quote quote quote quote quote quote quote
quote quote quote quote quote quote quote quote quote quote quote
quote quote quote quote quote quote quote quote quote quote quote
quote quote quote quote quote quote quote quote quote quote quote
quote quote quote quote quote quote 
\end{quote}
%
This is a quotation:
\begin{quotation}
Quotation quotation quotation quotation quotation quotation quotation
quotation quotation quotation quotation quotation quotation quotation
quotation quotation quotation quotation quotation quotation quotation
quotation quotation quotation quotation quotation quotation quotation
quotation quotation quotation quotation quotation quotation 
\end{quotation}
%
This is a displayquote:
\begin{displayquote}[Source][.]
Displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote
\end{displayquote}
%
This is a foreigndisplayquote:
\begin{foreigndisplayquote}{ngerman}[Source][.]
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote
\end{foreigndisplayquote}
%
This is a hyphendisplayquote:
\begin{hyphendisplayquote}{ngerman}[Source][.]
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote displayquote displayquote displayquote displayquote displayquote
displayquote
\end{hyphendisplayquote}

\end{document}
