APA

Ritchie G. H., . (2000). Organ technique. New York [etc.]: Oxford University Press.

Chicago

Ritchie George H, . 2000. Organ technique. New York [etc.]: Oxford University Press.

Harvard

Ritchie G. H., . (2000). Organ technique. New York [etc.]: Oxford University Press.

MLA

Ritchie George H, . Organ technique. New York [etc.]: Oxford University Press. 2000.