Cita APA (7a ed.)

Okólski, M. (1999). Migration pressures on Europe. Olympus - Centre for Education and Business Development.

Cita Chicago Style (17a ed.)

Okólski, Marek. Migration Pressures on Europe. Warsaw: Olympus - Centre for Education and Business Development, 1999.

Cita MLA (9a ed.)

Okólski, Marek. Migration Pressures on Europe. Olympus - Centre for Education and Business Development, 1999.