Ustinov, P. (1991). The Old Man and Mr Smith = Der alte Mann und Mr. Smith <engl.>: Peter Ustinov. Michael O'Mara Books.
Cita Chicago (17th ed.)Ustinov, Peter. The Old Man and Mr Smith = Der Alte Mann Und Mr. Smith <engl.>: Peter Ustinov. London: Michael O'Mara Books, 1991.
Cita MLA (8th ed.)Ustinov, Peter. The Old Man and Mr Smith = Der Alte Mann Und Mr. Smith <engl.>: Peter Ustinov. Michael O'Mara Books, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.