Cita APA (7th ed.)

Mackay, J. H. (1889). Helene. Henckell.

Cita Chicago (17th ed.)

Mackay, John Henry. Helene. Zürich, Leipzig: Henckell, 1889.

Cita MLA (8th ed.)

Mackay, John Henry. Helene. Henckell, 1889.