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.

Tiersky, Ethel, and 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.

Tiersky, Ethel, and 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.