Gaya APA

Armstrong, M. (2009). Armstrong's handbook of performance management : an evidence-based guide to delivering high performance 4 th edition (4 th edition). London: Kogan Page Limited.

Gaya MLA

Armstrong, Michael. "Armstrong's handbook of performance management : an evidence-based guide to delivering high performance 4 th edition". 4 th edition London: Kogan Page Limited, 2009. MM.