Freivalds, A. (2009). Niebel’s methods, standards, and work design. Boston: McGraw-Hill Higher Education.
استشهاد بنمط شيكاغوFreivalds, Andris. Niebel’s Methods, Standards, and Work Design. Boston: McGraw-Hill Higher Education, 2009.
MLA استشهادFreivalds, Andris. Niebel’s Methods, Standards, and Work Design. Boston: McGraw-Hill Higher Education, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.