Cita APA (7a ed.)

Mueller, F., & Purcell, J. (1992). The drive for higher productivity. [s.n.].

Cita Chicago Style (17a ed.)

Mueller, Frank, y John Purcell. The Drive for Higher Productivity. [S.l.]: [s.n.], 1992.

Cita MLA (9a ed.)

Mueller, Frank, y John Purcell. The Drive for Higher Productivity. [s.n.], 1992.