APA

Duncan C., . (1980). The art of classical guitar playing. U. S. A: Summy - Birchard Music.

Chicago

Duncan Charles, . 1980. The art of classical guitar playing. U. S. A: Summy - Birchard Music.

Harvard

Duncan C., . (1980). The art of classical guitar playing. U. S. A: Summy - Birchard Music.

MLA

Duncan Charles, . The art of classical guitar playing. U. S. A: Summy - Birchard Music. 1980.