Gaya APA

Robbins, S, P. (1989). Training in inter-personal skills : tips for managing people at work . Englewood Cliffs: Prentice Hall.

Gaya MLA

Robbins, Stephen, P.. "Training in inter-personal skills : tips for managing people at work". Englewood Cliffs: Prentice Hall, 1989. Buku/Printed Material.