Cita APA (7th ed.)

Freivalds, A., & Niebel, B. W. (2009). Niebel's methods, standards, and work design (12th ed., international ed.). McGraw-Hill Higher Education.

Cita Chicago (17th ed.)

Freivalds, Andres, i Benjamin W. Niebel. Niebel's Methods, Standards, and Work Design. 12th ed., international ed. Boston: McGraw-Hill Higher Education, 2009.

Cita MLA (9th ed.)

Freivalds, Andres, i Benjamin W. Niebel. Niebel's Methods, Standards, and Work Design. 12th ed., international ed. McGraw-Hill Higher Education, 2009.