APA (7th ed.) Citation

Grupo Quercus. (1990). Biologa. Erein.

Chicago Style (17th ed.) Citation

Grupo Quercus. Biologa. [San SebastiÆn]: Erein, 1990.

MLA (9th ed.) Citation

Grupo Quercus. Biologa. Erein, 1990.

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