Cita APA (7a ed.)

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.

Cita Chicago Style (17a ed.)

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.

Cita MLA (9a ed.)

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.