Cita APA (7a ed.)

Keil, F. C. (1979). Semantic and conceptual development: : an ontological perspective. Harvard University Press.

Cita Chicago Style (17a ed.)

Keil, Frank C. Semantic and Conceptual Development: : An Ontological Perspective. Cambridge (Massachusetts) [etc.]: Harvard University Press, 1979.

Cita MLA (9a ed.)

Keil, Frank C. Semantic and Conceptual Development: : An Ontological Perspective. Harvard University Press, 1979.