Gaya APA
Engineering economy. (2002).
New York:
McGraw-Hill.
Gaya Chicago
Engineering economy.
5th.
New York:
McGraw-Hill,
2002.
Buku.
Gaya MLA
Engineering economy.
5th.
New York:
McGraw-Hill,
2002.
Buku.
Gaya Turabian
Engineering economy.
New York:
McGraw-Hill,
2002.
Buku.