Abril, M. Classics of popular music: Intermediate solos for classical guitar. Charles Hansen Educational Music & Books.
Citazione stile Chigago Style (17a edizione)Abril, Mario. Classics of Popular Music: Intermediate Solos for Classical Guitar. New York: Charles Hansen Educational Music & Books.
Citatione MLA (9a ed.)Abril, Mario. Classics of Popular Music: Intermediate Solos for Classical Guitar. Charles Hansen Educational Music & Books.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.