Citazione Stile APA (7a Edizione)

Optic, O. (1894). Up and down the Nile or Young Adventurers in Africa. All-Over-the-World-Library. Second Series.

Citazione stile Chigago Style (17a edizione)

Optic, Oliver. Up and Down the Nile or Young Adventurers in Africa. All-Over-the-World-Library. Second Series. 1894.

Citatione MLA (9a ed.)

Optic, Oliver. Up and Down the Nile or Young Adventurers in Africa. All-Over-the-World-Library. Second Series. 1894.