* [http://logic-law.com/index.php?title=Verbal_Logic An Outline for Verbal Logic]
* Introductions and tutorials
** [http://www.galilean-library.org/manuscript.php?postid=43782 An Introduction to Philosophical Logic], by Paul Newall, aimed at beginners.
** [http://www.fecundity.com/logic/ forall x: an introduction to formal logic], by [[P.D. Magnus]], covers sentential and quantified logic.
** [http://www.filozofia.uw.edu.pl/kpaprzycka/Publ/xLogicSelfTaught.html Logic Self-Taught: A Workbook] (originally prepared for on-line logic instruction).
*** [[Nicholas Rescher]]. (1964). ''Introduction to Logic'', St. Martin's Press.
* Essays
** [http://durendal.org:8080/lcsl/ "Symbolic Logic"] and [http://www.gutenberg.org/etext/4763 "The Game of Logic"], [[Lewis Carroll]], 1896.
** [http://etext.lib.virginia.edu/DicHist/analytic/anaVII.html Math & Logic: The history of formal mathematical, logical, linguistic and methodological ideas.] In ''The Dictionary of the History of Ideas.''
* Online Tools
** [http://thefirstscience.org/syllogistic-machine/ Interactive Syllogistic Machine] A web based syllogistic machine for exploring fallacies, figures, terms, and modes of syllogisms.
* Reference material
** [http://www.earlham.edu/~peters/courses/log/transtip.htm Translation Tips], by Peter Suber, for translating from English into logical notation.
** [http://www.ontology.co/history-of-logic.htm Ontology and History of Logic. An Introduction] with an annotated bibliography.
* Reading lists
** The [http://www.ucl.ac.uk/philosophy/LPSG/ London Philosophy Study Guide] offers many suggestions on what to read, depending on the student's familiarity with the subject: