Citazione Stile APA (7a Edizione)

Kalvin, L., & Holt, S. (1956). Unit outlines in world history: (with social studies skills. College entrance book comp.

Citazione stile Chigago Style (17a edizione)

Kalvin, Louis, e Solomon Holt. Unit Outlines in World History: (with Social Studies Skills. New York, NY: College entrance book comp, 1956.

Citatione MLA (9a ed.)

Kalvin, Louis, e Solomon Holt. Unit Outlines in World History: (with Social Studies Skills. College entrance book comp, 1956.