Cita APA (7a ed.)

(1999). Initial steps in the validation of the second language proficiency descriptors for public high schools, colleges, and universities in California: Writing / Frances A. Butler, Robin Stevens.

Cita Chicago Style (17a ed.)

Initial Steps in the Validation of the Second Language Proficiency Descriptors for Public High Schools, Colleges, and Universities in California: Writing / Frances A. Butler, Robin Stevens. 1999.

Cita MLA (9a ed.)

Initial Steps in the Validation of the Second Language Proficiency Descriptors for Public High Schools, Colleges, and Universities in California: Writing / Frances A. Butler, Robin Stevens. 1999.