Gaya APA
HUGHES, P., FERRETT, E.
(2011).
Introduction to health and safety at work:
(
5th ed.)
.
Amsterdam:
Elsevier.
Gaya MLA
HUGHES, Phil., FERRETT, Ed.
"Introduction to health and safety at work:".
5th ed.
Amsterdam:
Elsevier,
2011.
Buku.