APA-ийн эшлэл(7 дахь хэвлэлт)

O'Hagan, S. (2014). Variability in assessor responses to undergraduate essays: An issue for assessment quality in higher education. Peter Lang.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

O'Hagan, Sally. Variability in Assessor Responses to Undergraduate Essays: An Issue for Assessment Quality in Higher Education. Bern: Peter Lang, 2014.

MLA -ийн эшлэл (9 дэх хэвлэлт)

O'Hagan, Sally. Variability in Assessor Responses to Undergraduate Essays: An Issue for Assessment Quality in Higher Education. Peter Lang, 2014.