Keene, G. B. (1961). Abstract sets and finite ordinals: An introduction to the study of set theory. Pergamon.
Citazione stile Chigago Style (17a edizione)Keene, G. B. Abstract Sets and Finite Ordinals: An Introduction to the Study of Set Theory. Nueva York: Pergamon, 1961.
Citatione MLA (9a ed.)Keene, G. B. Abstract Sets and Finite Ordinals: An Introduction to the Study of Set Theory. Pergamon, 1961.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.