APA-ийн эшлэл(7 дахь хэвлэлт)

Friedrich, C. J. (1968). Constitutional government and democracy: Theory and practice in Europe and America (4th ed.). Oxford & IBH.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Friedrich, Carl J. Constitutional Government and Democracy: Theory and Practice in Europe and America. 4th ed. Calcutta: Oxford & IBH, 1968.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Friedrich, Carl J. Constitutional Government and Democracy: Theory and Practice in Europe and America. 4th ed. Oxford & IBH, 1968.