Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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