APA-ийн эшлэл(7 дахь хэвлэлт)

Bowen, P., & Delaney, D. (2011). Champions: Student's book y workbook, level 2. Oxford University Press.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Bowen, Philippa, ба Denis Delaney. Champions: Student's Book Y Workbook, Level 2. Oxford: Oxford University Press, 2011.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Bowen, Philippa, ба Denis Delaney. Champions: Student's Book Y Workbook, Level 2. Oxford University Press, 2011.