Gaya APA
Krar, S, F. et al (2011).
Technology of Machine Tools seventh edition (Seventh Edition).
U.S.A:
The MC Graw Hill Companies.
Gaya MLA
Krar, Steve, F. et al.
"Technology of Machine Tools seventh edition".
Seventh Edition
U.S.A:
The MC Graw Hill Companies,
2011.
Text.