Cita APA (7th ed.)

Howson, C. (1997). Logic With Trees: An introduction to symbolic logic. Routledge.

Cita Chicago (17th ed.)

Howson, Colin. Logic With Trees: An Introduction to Symbolic Logic. London: Routledge, 1997.

Cita MLA (9th ed.)

Howson, Colin. Logic With Trees: An Introduction to Symbolic Logic. Routledge, 1997.