Flavell, J. H. (1977). Cognitive development. Prentice-Hall.
Chicago Style aipamenaFlavell, John H. Cognitive Development. Englewood Cliffs, N.J.: Prentice-Hall, 1977.
MLA aipamenaFlavell, John H. Cognitive Development. Prentice-Hall, 1977.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.