APA-ийн эшлэл(7 дахь хэвлэлт)
Westney, P. (1995). Modals and periphrastics in English: An investigation into the semantic correspondence between certain English modal verbs and their periphrastic equivalents. Max Niemeyer Verlag.
Чикаго-гийн эшлэл (17 дахь хэвлэлт)
Westney, Paul. Modals and Periphrastics in English: An Investigation into the Semantic Correspondence Between Certain English Modal Verbs and Their Periphrastic Equivalents. Tübingen: Max Niemeyer Verlag, 1995.
MLA -ийн эшлэл (9 дэх хэвлэлт)
Westney, Paul. Modals and Periphrastics in English: An Investigation into the Semantic Correspondence Between Certain English Modal Verbs and Their Periphrastic Equivalents. Max Niemeyer Verlag, 1995.
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