Staley, R. Travelling light: Richard Staley. Natural standards.(2001).
Cita Chicago (17th ed.)Staley, Richard. "Travelling Light: Richard Staley." Natural Standards.(2001) .
Cita MLA (8th ed.)Staley, Richard. "Travelling Light: Richard Staley." Natural Standards.(2001), .
Atenció: Aquestes cites poden no estar 100% correctes.