APA-ийн эшлэл(7 дахь хэвлэлт)

Langan, J. P., & Weigel, G. (1991). The American search for peace: Moral reasoning religious hope, and national security. Georgetown University.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Langan, John P., ба George Weigel. The American Search for Peace: Moral Reasoning Religious Hope, and National Security. Washington: Georgetown University, 1991.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Langan, John P., ба George Weigel. The American Search for Peace: Moral Reasoning Religious Hope, and National Security. Georgetown University, 1991.