Khaleghi,A . (2003). European Police Office (Europol). Journal of Legal Research, 2(3), 263-267.

Khaleghi,A . "European Police Office (Europol)", Journal of Legal Research, 2, 3, 2003, 263-267.

Khaleghi A. (2003). 'European Police Office (Europol)', Journal of Legal Research, 2(3), pp. 263-267.

A Khaleghi, "European Police Office (Europol)," Journal of Legal Research, 2 3 (2003): 263-267,

Khaleghi A. European Police Office (Europol). Journal of Legal Research. 2003;2(3):263-267 (In Persian).