Gaya APA

m.pd.,, D, S, A. (2002). Improve your management skills: tips and suggestions to achive success in managing your business and your people . Singapore: wharton book (s).

Gaya MLA

m.pd.,, Dr., Sri, Astuti,. "Improve your management skills: tips and suggestions to achive success in managing your business and your people". Singapore: wharton book (s), 2002. Text.