Citazione Stile APA (7a Edizione)

KRULIK, S. (1971). A hand book of aids for teaching junior-senior highschool mathematics. W.B. Saunders.

Citazione stile Chigago Style (17a edizione)

KRULIK, Stephen. A Hand Book of Aids for Teaching Junior-senior Highschool Mathematics. Philadelpia: W.B. Saunders, 1971.

Citatione MLA (9a ed.)

KRULIK, Stephen. A Hand Book of Aids for Teaching Junior-senior Highschool Mathematics. W.B. Saunders, 1971.