APA (7th ed.) Zitazioa

Tiersky, E., & Tiersky, M. (1990). The USA: Customs and institutions. A survey of american culture and traditions. An advanced reader for ESL and EFL students (3a. ed.). Prentice Hall Regents.

Chicago Style (17th ed.) Zitazioa

Tiersky, Ethel, eta Martin Tiersky. The USA: Customs and Institutions. A Survey of American Culture and Traditions. An Advanced Reader for ESL and EFL Students. 3a. ed. Englewood Cliffs: Prentice Hall Regents, 1990.

MLA (9th ed.) Zitazioa

Tiersky, Ethel, eta Martin Tiersky. The USA: Customs and Institutions. A Survey of American Culture and Traditions. An Advanced Reader for ESL and EFL Students. 3a. ed. Prentice Hall Regents, 1990.