Benedikt, M., Puppis, G., & Vu, H. (2010). Positive Higher−Order Queries.
Lua i Stíl Chicago (17ú heag.)Benedikt, M., G. Puppis, agus H. Vu. Positive Higher−Order Queries. 2010.
Lua MLA (9ú heag.)Benedikt, M., et al. Positive Higher−Order Queries. 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.