Cita APA (7a ed.)

Guth, H. P. (1977). American English today (2nd ed., rev.). Webster Division/McGraw-Hill.

Cita Chicago Style (17a ed.)

Guth, Hans Paul. American English Today. 2nd ed., rev. New York: Webster Division/McGraw-Hill, 1977.

Cita MLA (8a ed.)

Guth, Hans Paul. American English Today. 2nd ed., rev. Webster Division/McGraw-Hill, 1977.