Gaya APA
H, ., ley, W, (.
(1969).
Industrial safety handbook
(
1969)
.
:
New York : McGraw-Hill Publ. Co.,.
Gaya MLA
H, ., ley, William, (Editor).
"Industrial safety handbook".
1969
:
New York : McGraw-Hill Publ. Co.,,
1969.
Text.