Abbs,Brian, & Freebairn,Ingrid. (1993). Blueprint: One. Longman.
Cita Chicago Style (17a ed.)Abbs,Brian, y Freebairn,Ingrid. Blueprint: One. Longman, 1993.
Cita MLA (8a ed.)Abbs,Brian, y Freebairn,Ingrid. Blueprint: One. Longman, 1993.
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