Cita APA (7a ed.)

Ballmer, T. T., & Pinkal, M. (1983). Approaching vagueness. North-Holland ; Elsevier Science Pub. Co.

Cita Chicago Style (17a ed.)

Ballmer, Thomas T., y Manfred Pinkal. Approaching Vagueness. Amsterdam ; New York : New York: North-Holland ; Elsevier Science Pub. Co, 1983.

Cita MLA (9a ed.)

Ballmer, Thomas T., y Manfred Pinkal. Approaching Vagueness. North-Holland ; Elsevier Science Pub. Co, 1983.