Gaya APA
J., T., A., T., B., L. (1989).
Engineering economy / Leland T. Blank, Anthony J. Tarqin (Ed.ke-3).
New York:
McGraw-Hill.
Gaya MLA
Tarqin, Anthony, J.., Blank, Leland, T..
"Engineering economy / Leland T. Blank, Anthony J. Tarqin".
Ed.ke-3
New York:
McGraw-Hill,
1989.
Textbook.