The Spode Group (London). (1986). The problem-solving pack: Teacher's guide. Edward Arnold.
Lua i Stíl Chicago (17ú heag.)The Spode Group (London). The Problem-solving Pack: Teacher's Guide. London: Edward Arnold, 1986.
Lua MLA (9ú heag.)The Spode Group (London). The Problem-solving Pack: Teacher's Guide. Edward Arnold, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.