Gaya APA
Purba, Radiks. (1997).
Analisis biaya dan manfaat = cost and benefit analysis : Radiks Purba (Cet.1).
Jakarta:
Rineka Cipta.
Gaya Chicago
Purba, Radiks.
Analisis biaya dan manfaat = cost and benefit analysis : Radiks Purba.
Cet.1
Jakarta:
Rineka Cipta,
1997.
Textbook.
Gaya MLA
Purba, Radiks.
Analisis biaya dan manfaat = cost and benefit analysis : Radiks Purba.
Cet.1
Jakarta:
Rineka Cipta,
1997.
Textbook.
Gaya Turabian
Purba, Radiks.
Analisis biaya dan manfaat = cost and benefit analysis : Radiks Purba.
Cet.1
Jakarta:
Rineka Cipta,
1997.
Textbook.