Brown Gfrorer, B. S. S. (1987). Basic english: Social and humanities / Brown Gfrorer, Bonnie; García Charpentier, Miriam; González Murillo, Trinidad; Trejos Montero, Elisa; Umaña Aguiar, Jeanina. Universidad de Costa Rica.
Style de citation Chicago (17e éd.)Brown Gfrorer, Bonnie; Smith Sharp. Basic English: Social and Humanities / Brown Gfrorer, Bonnie; García Charpentier, Miriam; González Murillo, Trinidad; Trejos Montero, Elisa; Umaña Aguiar, Jeanina. San José, Costa Rica: Universidad de Costa Rica, 1987.
Style de citation MLA (9e éd.)Brown Gfrorer, Bonnie; Smith Sharp. Basic English: Social and Humanities / Brown Gfrorer, Bonnie; García Charpentier, Miriam; González Murillo, Trinidad; Trejos Montero, Elisa; Umaña Aguiar, Jeanina. Universidad de Costa Rica, 1987.
Attention : ces citations peuvent ne pas être correctes à 100%.