Gaya APA
HUGHES, P., FERRETT, E.
(2016).
Introduction to health and safety at work:
(
6th ed.)
.
New York:
Routhledge.
Gaya MLA
HUGHES, Phil., FERRETT, Ed.
"Introduction to health and safety at work:".
6th ed.
New York:
Routhledge,
2016.
Buku.