Ybanez, L. M. (1993). Basic statistics. Phoenix Pub.
Lua i Stíl Chicago (17ú heag.)Ybanez, Lydia Monzon. Basic Statistics. Quezon City: Phoenix Pub, 1993.
Lua MLA (9ú heag.)Ybanez, Lydia Monzon. Basic Statistics. Phoenix Pub, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.