Dixson, R. J., & Boggs, R. S. Sound teaching a laboratory manual of American english.
Citación estilo ChicagoDixson, Robert J., and Ralph S. Boggs. Sound Teaching a Laboratory Manual of American English.
Cita MLADixson, Robert J., and Ralph S. Boggs. Sound Teaching a Laboratory Manual of American English.
Warning: These citations may not always be 100% accurate.