APA (7th ed.) Zitazioa

Hull, A. L., Machuca, B. G., Méndez, F., Robinett, R. F., Valle, K. M. d., Rojas, P. M., & Fries, C. C. (1953). Study of english as a second language. D. C. Heath.

Chicago Style (17th ed.) Zitazioa

Hull, Adrian L., Belén G. Machuca, Francisca Méndez, Ralph F. Robinett, Katharene M. del Valle, Pauline M. Rojas, eta Charles C. Fries. Study of English as a Second Language. Boston: D. C. Heath, 1953.

MLA (9th ed.) Zitazioa

Hull, Adrian L., et al. Study of English as a Second Language. D. C. Heath, 1953.