Dixson, R. J., & Boggs, R. S. Sound teaching a laboratory manual of American english.
Cita Chicago (17th ed.)Dixson, Robert J., i Ralph S. Boggs. Sound Teaching a Laboratory Manual of American English.
Cita MLA (8th ed.)Dixson, Robert J., i Ralph S. Boggs. Sound Teaching a Laboratory Manual of American English.
Atenció: Aquestes cites poden no estar 100% correctes.