APA-ийн эшлэл(7 дахь хэвлэлт)

Bertolo, S. (2001). Language acquisition and learnability. Cambridge University.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Bertolo, Stefano. Language Acquisition and Learnability. Cambridge: Cambridge University, 2001.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Bertolo, Stefano. Language Acquisition and Learnability. Cambridge University, 2001.