Cita APA (7a ed.)
Howson, C. (1997). Logic with trees: An introduction to symbolic logic. Routledge.
Cita Chicago Style (17a ed.)
Howson, Colin. Logic with Trees: An Introduction to Symbolic Logic. London ; New York: Routledge, 1997.
Cita MLA (9a ed.)
Howson, Colin. Logic with Trees: An Introduction to Symbolic Logic. Routledge, 1997.
Precaución: Estas citas no son 100% exactas.