KRULIK, S. (1971). A hand book of aids for teaching junior-senior highschool mathematics. W.B. Saunders.
Lua i Stíl Chicago (17ú heag.)KRULIK, Stephen. A Hand Book of Aids for Teaching Junior-senior Highschool Mathematics. Philadelpia: W.B. Saunders, 1971.
Lua MLA (9ú heag.)KRULIK, Stephen. A Hand Book of Aids for Teaching Junior-senior Highschool Mathematics. W.B. Saunders, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.