1.
Deontic logic. Dordrecht, Holland: D. Reidel publishing company; 1971.
Deontic logic. Dordrecht, Holland : D. Reidel publishing company, 7 mai 1971. ISBN 90-277-0167-9
Hilpinen Risto. (1971). Deontic logic: Introductory and systematic readings. D. Reidel publishing company.
Style de citation MLA (8e éd.)Hilpinen Risto. Deontic Logic: Introductory and Systematic Readings. D. Reidel publishing company, 1971.
Attention : ces citations peuvent ne pas être correctes à 100%.