Cita APA (7th ed.)

Lungton, R. C. (1986). American topics: A reading-vocabulary text for speakers of English as a second language (2a. ed.). Prentice Hall Regents.

Cita Chicago (17th ed.)

Lungton, Robert C. American Topics: A Reading-vocabulary Text for Speakers of English as a Second Language. 2a. ed. Englewood Cliffs: Prentice Hall Regents, 1986.

Cita MLA (9th ed.)

Lungton, Robert C. American Topics: A Reading-vocabulary Text for Speakers of English as a Second Language. 2a. ed. Prentice Hall Regents, 1986.