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.