APA-ийн эшлэл(7 дахь хэвлэлт)

Hegemann, H., Heller, R., & Kahl, M. (2012). Studying Effectiveness in International Relations: A guide for students and scholars. Verlag Barbara Budrich.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Hegemann, Hendrik, Regina Heller, ба Martin Kahl. Studying Effectiveness in International Relations: A Guide for Students and Scholars. Leverkusen-Opladen: Verlag Barbara Budrich, 2012.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Hegemann, Hendrik, et al. Studying Effectiveness in International Relations: A Guide for Students and Scholars. Verlag Barbara Budrich, 2012.