Cita APA (7th ed.)
Eldring, J. (2009). Porter's (1980) generic strategies, performance and risk: An empirical investigation with German data. Diplomica Verlag.
Cita Chicago (17th ed.)
Eldring, Jan. Porter's (1980) Generic Strategies, Performance and Risk: An Empirical Investigation with German Data. Hamburg: Diplomica Verlag, 2009.
Cita MLA (9th ed.)
Eldring, Jan. Porter's (1980) Generic Strategies, Performance and Risk: An Empirical Investigation with German Data. Diplomica Verlag, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.