Originalus: Theory Games for Windows. Theory Games for Windows. Games. version 1.5. - Levels 3, 4, 5. Piano Method sheet music.
Vertimas: Teorija Windows "skirti žaidimai. - 4 lygis 3, 5, kurį sudaro Willard A. Palmer, Morton Manus, Amanda Vick Lethco ir Rob Wren.
