APA (7e ed.) Bronvermelding

Machray, R. (1939). The Eastern question revived: Bulgar claims on Rumania. G. Allen & Unwin, ltd..

Chicago (17e ed.) Bronvermelding

Machray, Robert. The Eastern Question Revived: Bulgar Claims on Rumania. London: G. Allen & Unwin, ltd., 1939.

MLA (8e ed.) Bronvermelding

Machray, Robert. The Eastern Question Revived: Bulgar Claims on Rumania. G. Allen & Unwin, ltd., 1939.