Cita APA

Langer, S. K. K. n. 1., & Langer, S. K. K. n. 1. (1953). An Introduction to symbolic logic (2. edition rev.). New York, New York: Dover.

Citación estilo Chicago

Langer, Susanne Katherina Knauth n. 1895, y Susanne Katherina Knauth n. 1895 Langer. An Introduction to Symbolic Logic. 2. edition rev. New York, New York: Dover, 1953.

Cita MLA

Langer, Susanne Katherina Knauth n. 1895, y Susanne Katherina Knauth n. 1895 Langer. An Introduction to Symbolic Logic. 2. edition rev. New York, New York: Dover, 1953.