Calder, J. La Concentration de Samuel Beckett: John Calder. Samuel Beckett.(1976).
Cita Chicago (17th ed.)Calder, John. "La Concentration De Samuel Beckett: John Calder." Samuel Beckett.(1976) .
Cita MLA (8th ed.)Calder, John. "La Concentration De Samuel Beckett: John Calder." Samuel Beckett.(1976), .
Atenció: Aquestes cites poden no estar 100% correctes.