APA (7th ed.) Citation

Celis, B. d. (1990). The Enforcement of prison sentences. Penal issues, 1, 4-6.

Chicago Style (17th ed.) Citation

Celis, Bernat de. "The Enforcement of Prison Sentences." Penal Issues 1 (1990): 4-6.

MLA (8th ed.) Citation

Celis, Bernat de. "The Enforcement of Prison Sentences." Penal Issues, 1, 1990, pp. 4-6.