APA (7th ed.) Citation

Otter, F., & Otter, R. (2001). Gitarrenschule. <<Rudolf>> Otter.

Chicago Style (17th ed.) Citation

Otter, Fabian, and Rudolf Otter. Gitarrenschule. München: <<Rudolf>> Otter, 2001.

MLA (9th ed.) Citation

Otter, Fabian, and Rudolf Otter. Gitarrenschule. <<Rudolf>> Otter, 2001.

Warning: These citations may not always be 100% accurate.