Παραπομπή σε μορφή APA (7η εκδ.)

Cruz-Ferreira, M. (2006). Three is a crowd?: Acquiring Portuguese in a trilingual environment. Multilingual Matters.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cruz-Ferreira, Madalena. Three Is a Crowd?: Acquiring Portuguese in a Trilingual Environment. Clevedon ; Buffalo: Multilingual Matters, 2006.

Παραπομπή σε μορφή MLA (9th εκδ.)

Cruz-Ferreira, Madalena. Three Is a Crowd?: Acquiring Portuguese in a Trilingual Environment. Multilingual Matters, 2006.