APA (7th ed.) Citation

Polibio & Romero, J. L. (1965). Historia universal. Solar.

Chicago Style (17th ed.) Citation

Polibio and José Luis Romero. Historia Universal. Buenos Aires: Solar, 1965.

MLA (9th ed.) Citation

Polibio and José Luis Romero. Historia Universal. Solar, 1965.

Warning: These citations may not always be 100% accurate.