Gaya APA

Weigel, U., Ruecker, M. (2017). The Strategic Procurement Practice Guide; Know-how, Tools and Techniques for Global Buyers . Germany: Springer.

Gaya MLA

Weigel, Ulrich., Ruecker, Marco. "The Strategic Procurement Practice Guide; Know-how, Tools and Techniques for Global Buyers". Germany: Springer, 2017. Text.