Kelz, H. P. (1978). Language planning in Germany - a model for the Philippines? Philippine Journal of Linguistics.
Lua i Stíl Chicago (17ú heag.)Kelz, Heinrich P. "Language Planning in Germany - a Model for the Philippines?" Philippine Journal of Linguistics 1978.
Lua MLA (9ú heag.)Kelz, Heinrich P. "Language Planning in Germany - a Model for the Philippines?" Philippine Journal of Linguistics, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.