APA-ийн эшлэл(7 дахь хэвлэлт)

ebrary, Inc, & Walker, J. A. (2010). Aspect in grammatical variation. John Benjamins Pub. Company.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

ebrary, Inc, ба James A. Walker. Aspect in Grammatical Variation. Amsterdam ; Philadelphia: John Benjamins Pub. Company, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

ebrary, Inc, ба James A. Walker. Aspect in Grammatical Variation. John Benjamins Pub. Company, 2010.