Alberta Education & Almberg, D. (1987). Essential concepts, skills and attitudes for grade 12 (2. draft, May 1967.). Alberta Education.
Citazione stile Chigago Style (17a edizione)Alberta Education e Diana Almberg. Essential Concepts, Skills and Attitudes for Grade 12. 2. draft, May 1967. Alberta: Alberta Education, 1987.
Citatione MLA (9a ed.)Alberta Education e Diana Almberg. Essential Concepts, Skills and Attitudes for Grade 12. 2. draft, May 1967. Alberta Education, 1987.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.