@BOOK{hodges-logic, AUTHOR = {Hodges, Wilfred}, ISBN = {0140136363}, PUBLISHER = {Penguin}, TITLE = {Logic: An Introduction to Elementary Logic}, YEAR = {1977, 1991}, } @MANUAL{saso-forest-manual, AUTHOR = {Živanović, Sašo}, DATE = {2016-03-04}, EDITION = {2.0.2}, KEYWORDS = {TeX, LaTeX, PGF, TikZ, Forest}, TITLE = {Forest: A {PGF}/Ti\mkbibemph{k}{Z}-Based Package for Drawing Linguistic Trees}, URL = {http://spj.ff.uni-lj.si/zivanovic/}, } @MANUAL{tantau-tikz-pgf-manual, AUTHOR = {Tantau, Till}, DATE = {2015-08-29}, EDITION = {3.0.1a}, KEYWORDS = {TeX, LaTeX, PGF, TikZ}, SUBTITLE = {Manual for Version 3.0.1a}, TITLE = {The {T}i\mkbibemph{k}{Z} and {PGF} Packages}, URL = {http://sourceforge.net/projects/pgf}, }