(1969). Steps to spoken english: Book three. : A graded course for spanish-speaking students. Longmans.
Cita Chicago Style (17a ed.)Steps to Spoken English: Book Three. : A Graded Course for Spanish-speaking Students. London: Longmans, 1969.
Cita MLA (8a ed.)Steps to Spoken English: Book Three. : A Graded Course for Spanish-speaking Students. Longmans, 1969.
Precaución: Estas citas no son 100% exactas.