Gaya APA
Purba, Radiks. (1997).
Analisis Biaya dan Manfaat (Cost and Benefit Analysis) .
Hoboken, NJ:
PT. Rineka Cipta.
Gaya Chicago
Purba, Radiks.
Analisis Biaya dan Manfaat (Cost and Benefit Analysis).
Hoboken, NJ:
PT. Rineka Cipta,
1997.
Text Book.
Gaya MLA
Purba, Radiks.
Analisis Biaya dan Manfaat (Cost and Benefit Analysis).
Hoboken, NJ:
PT. Rineka Cipta,
1997.
Text Book.
Gaya Turabian
Purba, Radiks.
Analisis Biaya dan Manfaat (Cost and Benefit Analysis).
Hoboken, NJ:
PT. Rineka Cipta,
1997.
Text Book.