APA (7th ed.) Citation

Härtling, P., Gartzia, X., & Siepen, C. a. d. (1983). Txirbel. Elkar.

Chicago Style (17th ed.) Citation

Härtling, Peter, Xabier Gartzia, and Christa aus dem Siepen. Txirbel. Donostia: Elkar, 1983.

MLA (9th ed.) Citation

Härtling, Peter, et al. Txirbel. Elkar, 1983.