Cita APA

Guth, H. P. (1970). American English today. St Louis, Miss.: Webster División, McGraw-Hill.

Citación estilo Chicago

Guth, Hans P. American English Today. St Louis, Miss.: Webster División, McGraw-Hill, 1970.

Cita MLA

Guth, Hans P. American English Today. St Louis, Miss.: Webster División, McGraw-Hill, 1970.