APA-ийн эшлэл(7 дахь хэвлэлт)
Petley, M. Introducing America: A text for english as a foreing language with reading selections, dialogs and grammar review. Washington Publications.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Petley, Mary. Introducing America: A Text for English as a Foreing Language with Reading Selections, Dialogs and Grammar Review. Washington: Washington Publications.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Petley, Mary. Introducing America: A Text for English as a Foreing Language with Reading Selections, Dialogs and Grammar Review. Washington Publications.
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