APA-ийн эшлэл(7 дахь хэвлэлт)

Gaston, P. L. (2010). The challenge of Bologna: What United States higher education has to learn from Europe, and why it matters that we learn it. Stylus.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Gaston, Paul L. The Challenge of Bologna: What United States Higher Education Has to Learn from Europe, and Why It Matters That We Learn It. Sterling, Va.: Stylus, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Gaston, Paul L. The Challenge of Bologna: What United States Higher Education Has to Learn from Europe, and Why It Matters That We Learn It. Stylus, 2010.