Easterbrook, R. E., & Curling, L. P. (1981). Ventures into geography: Africa, grade 6 (10. reprint.). College Press.
Citazione stile Chigago Style (17a edizione)Easterbrook, R. E., e Len P. Curling. Ventures into Geography: Africa, Grade 6. 10. reprint. Salisbury: College Press, 1981.
Citatione MLA (9a ed.)Easterbrook, R. E., e Len P. Curling. Ventures into Geography: Africa, Grade 6. 10. reprint. College Press, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.