Gaya APA
Gregory, D., Shanahan, P. (2010).
The Human Element : A Guide to Human Behaviour in the Shipping Industry .
United Kingdom:
Penerbit The Stationery Office.
Gaya MLA
Gregory, Dik., Shanahan, Paul.
"The Human Element : A Guide to Human Behaviour in the Shipping Industry".
United Kingdom:
Penerbit The Stationery Office,
2010.
Text.