Cita APA (7th ed.)

Cassidy, C. M. K. R. (2011). Principal of management (12th.). South western cengage learning.

Cita Chicago (17th ed.)

Cassidy, Carlene M.& Kreitner Robert. Principal of Management. 12th. Australia: South western cengage learning, 2011.

Cita MLA (9th ed.)

Cassidy, Carlene M.& Kreitner Robert. Principal of Management. 12th. South western cengage learning, 2011.