Gaya APA
Blank, Leland. (2012).
Engineering economy Blank (7th ed.) (7).
Singapore:
McGraw-Hill.
Gaya Chicago
Blank, Leland.
Engineering economy Blank (7th ed.).
7
Singapore:
McGraw-Hill,
2012.
Text.
Gaya MLA
Blank, Leland.
Engineering economy Blank (7th ed.).
7
Singapore:
McGraw-Hill,
2012.
Text.
Gaya Turabian
Blank, Leland.
Engineering economy Blank (7th ed.).
7
Singapore:
McGraw-Hill,
2012.
Print.