Cita APA (7th ed.)

Droogmans, J. (1959). In memoriam Professor Mr. J.-H.-Paul Bellefroid. S.l.: s.n.

Cita Chicago (17th ed.)

Droogmans, Jozef. In Memoriam Professor Mr. J.-H.-Paul Bellefroid. S.l.: s.n, 1959.

Cita MLA (8th ed.)

Droogmans, Jozef. In Memoriam Professor Mr. J.-H.-Paul Bellefroid. S.l.: s.n, 1959.