Using the {\tt quotation} environment, you can do quotation blocks!


\begin{verbatim}
\begin{quotation}
a very long quote here... \cite[10]{sicp}
\end{quotation}
\end{verbatim}

Here is an example of what it looks like (a great quote from Abelson and Sussman):


\begin{quotation}
Our traffic with the subject matter of this book involves us with three foci of phenomena: the human mind, collections of computer programs, and the computer. Every computer program is a model, hatched in the mind, of a real or mental process. These processes, arising from human experience and thought, are huge in number, intricate in detail, and at any time only partially understood. They are modeled to our permanent satisfaction rarely by our computer programs. Thus even though our programs are carefully handcrafted discrete collections of symbols, mosaics of interlocking functions, they continually evolve: we change them as our perception of the model deepens, enlarges, generalizes until the model ultimately attains a metastable place within still another model with which we struggle. The source of the exhilaration associated with computer programming is the continual unfolding within the mind and on the computer of mechanisms expressed as programs and the explosion of perception they generate. If art interprets our dreams, the computer executes them in the guise of programs! \cite[10]{sicp}
\end{quotation}

