APA (7e ed.) Bronvermelding

Hirvonen, L. (1984). Smoking cessation by the five-day plan in Finland. University of Oulu : Oulu University Library, [distr.].

Chicago (17e ed.) Bronvermelding

Hirvonen, Leo. Smoking Cessation by the Five-day Plan in Finland. Oulu: University of Oulu : Oulu University Library, [distr.], 1984.

MLA (8e ed.) Bronvermelding

Hirvonen, Leo. Smoking Cessation by the Five-day Plan in Finland. University of Oulu : Oulu University Library, [distr.], 1984.