Gaya APA
Dwivedi, D., Dwivedi, A.
(2005).
Engineering economics
(
1st Ed.)
.
New Delhi:
Vikas publishing house Pvt.Ltd.
Gaya MLA
Dwivedi, D.N.., Dwivedi, Abhishel.
"Engineering economics".
1st Ed.
New Delhi:
Vikas publishing house Pvt.Ltd,
2005.
Text.