Citazione Stile APA (7a Edizione)

(1994). Social studies 20: World issues ; a curriculum guide ([Stand:] September 1994.).

Citazione stile Chigago Style (17a edizione)

Social Studies 20: World Issues ; a Curriculum Guide. [Stand:] September 1994. Regina, 1994.

Citatione MLA (9a ed.)

Social Studies 20: World Issues ; a Curriculum Guide. [Stand:] September 1994. 1994.