APA (7th ed.) Citation

Aho, T. (1997). How Finland halved its prison population within two decades. CEP bulletin, 6, 8-9.

Chicago Style (17th ed.) Citation

Aho, Timo. "How Finland Halved Its Prison Population Within Two Decades." CEP Bulletin 6 (1997): 8-9.

MLA (8th ed.) Citation

Aho, Timo. "How Finland Halved Its Prison Population Within Two Decades." CEP Bulletin, 6, 1997, pp. 8-9.