External links Peter Langtoft

thiolier, j. c. (2004). langtoft, peter (d. in or after 1305) . oxford dictionary of national biography. oxford university press. doi:10.1093/ref:odnb/16037. retrieved 2009-10-14.  (subscription or uk public library membership required)
 chisholm, hugh, ed. (1911). langtoft, peter . encyclopædia britannica (11th ed.). cambridge university press. 
manuscript of langtoft s chronicle in british library: british library catalogue of illuminated manuscripts, royal 20 ii
the reign of edward i, chronicle written langtoft contained in trilingual compendium of texts in cambridge digital library