Fleege, U. H. (1956). Problems in education. Philippine-Unesco National Community School Training Center.
Lua i Stíl Chicago (17ú heag.)Fleege, Urban H. Problems in Education. Bayambang, Pangasinan: Philippine-Unesco National Community School Training Center, 1956.
Lua MLA (9ú heag.)Fleege, Urban H. Problems in Education. Philippine-Unesco National Community School Training Center, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.