APA (7th ed.) Citation

Schubin, O., & Wister, A. L. (2011). Countess Erika's Apprenticeship. Project Gutenberg.

Chicago Style (17th ed.) Citation

Schubin, Ossip, and A. L. Wister. Countess Erika's Apprenticeship. Project Gutenberg, 2011.

MLA (9th ed.) Citation

Schubin, Ossip, and A. L. Wister. Countess Erika's Apprenticeship. Project Gutenberg, 2011.

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