Van Opstal, D. (1984). Technical excellence in America: Incentives for investment in human capital. Washington, DC : The Center for Strategic and International Studies.
Lua i Stíl Chicago (17ú heag.)Van Opstal, Debra. Technical Excellence in America: Incentives for Investment in Human Capital. Washington, DC : The Center for Strategic and International Studies, 1984.
Lua MLA (9ú heag.)Van Opstal, Debra. Technical Excellence in America: Incentives for Investment in Human Capital. Washington, DC : The Center for Strategic and International Studies, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.