Citazione Stile APA (7a Edizione)

Bergen, J. J., & Bills, G. D. (1983). Spanish and portuguese in social context. Georgetown University Press.

Citazione stile Chigago Style (17a edizione)

Bergen, John J., e Garland D. Bills. Spanish and Portuguese in Social Context. Washington, D.C: Georgetown University Press, 1983.

Citatione MLA (9a ed.)

Bergen, John J., e Garland D. Bills. Spanish and Portuguese in Social Context. Georgetown University Press, 1983.