University of the Philippines (Diliman). School of Economics & Industrial Promotion Policies Project. (1978). Why border prices? UPSE.
Lua i Stíl Chicago (17ú heag.)University of the Philippines (Diliman). School of Economics agus Industrial Promotion Policies Project. Why Border Prices? [Quezon City]: UPSE, 1978.
Lua MLA (9ú heag.)University of the Philippines (Diliman). School of Economics agus Industrial Promotion Policies Project. Why Border Prices? UPSE, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.