Learned, E. (1950). Old Portuguese vocalic finals: Phonology and orthography of accented-ou, -eu, -iu and-ao, -eo, -io. Linguistic Soc. of America.
Chicago Style (17th ed.) CitationLearned, Erma. Old Portuguese Vocalic Finals: Phonology and Orthography of Accented-ou, -eu, -iu And-ao, -eo, -io. Baltimore: Linguistic Soc. of America, 1950.
MLA (9th ed.) CitationLearned, Erma. Old Portuguese Vocalic Finals: Phonology and Orthography of Accented-ou, -eu, -iu And-ao, -eo, -io. Linguistic Soc. of America, 1950.
Warning: These citations may not always be 100% accurate.