Oorspronkelijk: Alfred's Essentials of Music Theory Software, Version 2.0, Volumes 2 & 3. Andrew Surmani. Lab Pack for 30 Computers. Reference Textbooks.
Vertaling: Alfred's Essentials of Music Theory Software, versie 2.0, Volumes 2. Alfred's Essentials of Music Theory Software, versie 2.0, Volumes 2.