APA-viite (7. p.)
Cruz-Ferreira, M. (2006). Three is a crowd?: Acquiring Portuguese in a trilingual environment. Multilingual Matters.
Chicago-viite (17. p.)
Cruz-Ferreira, Madalena. Three Is a Crowd?: Acquiring Portuguese in a Trilingual Environment. Clevedon, UK ; Buffalo, NY: Multilingual Matters, 2006.
MLA-viite (9. p.)
Cruz-Ferreira, Madalena. Three Is a Crowd?: Acquiring Portuguese in a Trilingual Environment. Multilingual Matters, 2006.
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