Gaya APA
Blank, L, T., Tarquin, A.
(1989).
Engineering Economy Third Edition
(
Ed. 3)
.
Singapore:
McGraw Hill.
Gaya MLA
Blank, Leland, T., Tarquin, Anthony.
"Engineering Economy Third Edition".
Ed. 3
Singapore:
McGraw Hill,
1989.
Teknik Sipil.