Center for Research and Documentation on World Language Problems. (1977). Language Problems and Language Planning. University of Texas Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Center for Research and Documentation on World Language Problems. Language Problems and Language Planning. Austin, Tex: University of Texas Press, 1977.
Παραπομπή σε μορφή MLA (8th εκδ.)Center for Research and Documentation on World Language Problems. Language Problems and Language Planning. University of Texas Press, 1977.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.