Parkinson, C. N. 109 Ways of getting to the top. Vision Books.
Cita Chicago (17th ed.)Parkinson, C. Northcote. 109 Ways of Getting to the Top. Vision Books.
Cita MLA (9th ed.)Parkinson, C. Northcote. 109 Ways of Getting to the Top. Vision Books.
Atenció: Aquestes cites poden no estar 100% correctes.